diff --git a/packages/connectivity/connectivity/CHANGELOG.md b/packages/connectivity/connectivity/CHANGELOG.md
index ba432a7..9325f1a 100644
--- a/packages/connectivity/connectivity/CHANGELOG.md
+++ b/packages/connectivity/connectivity/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.8+6
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.4.8+5
 
 * Declare API stability and compatibility with `1.0.0` (more details at: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0).
diff --git a/packages/connectivity/connectivity/pubspec.yaml b/packages/connectivity/connectivity/pubspec.yaml
index 1ebc902..9aaa262 100644
--- a/packages/connectivity/connectivity/pubspec.yaml
+++ b/packages/connectivity/connectivity/pubspec.yaml
@@ -5,7 +5,7 @@
 # 0.4.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.4.8+5
+version: 0.4.8+6
 
 flutter:
   plugin:
@@ -37,5 +37,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/connectivity/connectivity_platform_interface/CHANGELOG.md b/packages/connectivity/connectivity_platform_interface/CHANGELOG.md
index 1b3ce38..e45f8f7 100644
--- a/packages/connectivity/connectivity_platform_interface/CHANGELOG.md
+++ b/packages/connectivity/connectivity_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.6
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.0.5
 
 * Remove dart:io Platform checks from the MethodChannel implementation. This is 
diff --git a/packages/connectivity/connectivity_platform_interface/pubspec.yaml b/packages/connectivity/connectivity_platform_interface/pubspec.yaml
index 5accb32..5bafcf9 100644
--- a/packages/connectivity/connectivity_platform_interface/pubspec.yaml
+++ b/packages/connectivity/connectivity_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/connectivity/connectivity_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.5
+version: 1.0.6
 
 dependencies:
   flutter:
@@ -17,5 +17,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/device_info/CHANGELOG.md b/packages/device_info/CHANGELOG.md
index 76481b1..057638d 100644
--- a/packages/device_info/CHANGELOG.md
+++ b/packages/device_info/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.2+4
+
+Update lower bound of dart dependency to 2.1.0.
+
 ## 0.4.2+3
 
 * Declare API stability and compatibility with `1.0.0` (more details at: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0).
diff --git a/packages/device_info/pubspec.yaml b/packages/device_info/pubspec.yaml
index d52e290..8ad768a 100644
--- a/packages/device_info/pubspec.yaml
+++ b/packages/device_info/pubspec.yaml
@@ -5,7 +5,7 @@
 # 0.4.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.4.2+3
+version: 0.4.2+4
 
 flutter:
   plugin:
@@ -28,5 +28,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0<3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md b/packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md
index 5d6559f..f94c945 100644
--- a/packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md
+++ b/packages/google_maps_flutter/google_maps_flutter/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.5.27+2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.5.27+1
 
 * Remove endorsement of `web` platform, it's not ready yet.
diff --git a/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
index fa65bc0..5bac7b8 100644
--- a/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter/pubspec.yaml
@@ -1,7 +1,7 @@
 name: google_maps_flutter
 description: A Flutter plugin for integrating Google Maps in iOS and Android applications.
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_maps_flutter/google_maps_flutter
-version: 0.5.27+1
+version: 0.5.27+2
 
 dependencies:
   flutter:
@@ -30,5 +30,5 @@
         pluginClass: FLTGoogleMapsPlugin
 
 environment:
-  sdk: ">=2.0.0-dev.47.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/google_maps_flutter/google_maps_flutter_platform_interface/CHANGELOG.md b/packages/google_maps_flutter/google_maps_flutter_platform_interface/CHANGELOG.md
index 54c2ab5..eca5c91 100644
--- a/packages/google_maps_flutter/google_maps_flutter_platform_interface/CHANGELOG.md
+++ b/packages/google_maps_flutter/google_maps_flutter_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.0.1
 
 * Initial open source release.
diff --git a/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml b/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml
index 346d960..b28b7f4 100644
--- a/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml
+++ b/packages/google_maps_flutter/google_maps_flutter_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_maps_flutter/google_maps_flutter_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.1
+version: 1.0.2
 
 dependencies:
   flutter:
@@ -19,5 +19,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.9.1+hotfix.4 <2.0.0"
diff --git a/packages/google_sign_in/google_sign_in/CHANGELOG.md b/packages/google_sign_in/google_sign_in/CHANGELOG.md
index ac59c15..a0d2d47 100644
--- a/packages/google_sign_in/google_sign_in/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.4.6
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 4.4.5
 
 * Fix requestScopes to allow subsequent calls on Android.
diff --git a/packages/google_sign_in/google_sign_in/pubspec.yaml b/packages/google_sign_in/google_sign_in/pubspec.yaml
index 6adc362..e02c8ee 100644
--- a/packages/google_sign_in/google_sign_in/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for Google Sign-In, a secure authentication system
   for signing in with a Google account on Android and iOS.
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_sign_in/google_sign_in
-version: 4.4.5
+version: 4.4.6
 
 flutter:
   plugin:
@@ -37,5 +37,5 @@
   e2e: ^0.2.1
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.4 <2.0.0"
diff --git a/packages/google_sign_in/google_sign_in_platform_interface/CHANGELOG.md b/packages/google_sign_in/google_sign_in_platform_interface/CHANGELOG.md
index c342c55..aa8ad2c 100644
--- a/packages/google_sign_in/google_sign_in_platform_interface/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.1.2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.1.1
 
 * Add attribute serverAuthCode.
diff --git a/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml b/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml
index 2484717..7bc63d8 100644
--- a/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_sign_in/google_sign_in_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.1.1
+version: 1.1.2
 
 dependencies:
   flutter:
@@ -18,5 +18,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.10.0 <2.0.0"
diff --git a/packages/image_picker/image_picker/CHANGELOG.md b/packages/image_picker/image_picker/CHANGELOG.md
index 66264e7..793c5a2 100644
--- a/packages/image_picker/image_picker/CHANGELOG.md
+++ b/packages/image_picker/image_picker/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.6.6+2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.6.6+1
 
 * Android: always use URI to get image/video data.
diff --git a/packages/image_picker/image_picker/pubspec.yaml b/packages/image_picker/image_picker/pubspec.yaml
index 48b781a..516cdfb 100755
--- a/packages/image_picker/image_picker/pubspec.yaml
+++ b/packages/image_picker/image_picker/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for selecting images from the Android and iOS image
   library, and taking new pictures with the camera.
 homepage: https://github.com/flutter/plugins/tree/master/packages/image_picker/image_picker
-version: 0.6.6+1
+version: 0.6.6+2
 
 flutter:
   plugin:
@@ -27,5 +27,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.10.0 <2.0.0"
diff --git a/packages/image_picker/image_picker_platform_interface/CHANGELOG.md b/packages/image_picker/image_picker_platform_interface/CHANGELOG.md
index 0d8803f..7708c34 100644
--- a/packages/image_picker/image_picker_platform_interface/CHANGELOG.md
+++ b/packages/image_picker/image_picker_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.1
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.0.0
 
 * Initial release.
diff --git a/packages/image_picker/image_picker_platform_interface/pubspec.yaml b/packages/image_picker/image_picker_platform_interface/pubspec.yaml
index 03efe09..a4ea5d1 100644
--- a/packages/image_picker/image_picker_platform_interface/pubspec.yaml
+++ b/packages/image_picker/image_picker_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/image_picker/image_picker_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.0
+version: 1.0.1
 
 dependencies:
   flutter:
@@ -18,5 +18,5 @@
   pedantic: ^1.8.0+1
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.10.0 <2.0.0"
diff --git a/packages/local_auth/CHANGELOG.md b/packages/local_auth/CHANGELOG.md
index a8135ef..b6941dc 100644
--- a/packages/local_auth/CHANGELOG.md
+++ b/packages/local_auth/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.6.2+2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.6.2+1
 
 * Fix CocoaPods podspec lint warnings.
diff --git a/packages/local_auth/pubspec.yaml b/packages/local_auth/pubspec.yaml
index 309b919..b43f6b9 100644
--- a/packages/local_auth/pubspec.yaml
+++ b/packages/local_auth/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for Android and iOS device authentication sensors
   such as Fingerprint Reader and Touch ID.
 homepage: https://github.com/flutter/plugins/tree/master/packages/local_auth
-version: 0.6.2+1
+version: 0.6.2+2
 
 flutter:
   plugin:
@@ -30,5 +30,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/package_info/CHANGELOG.md b/packages/package_info/CHANGELOG.md
index 1134d15..9b233ee 100644
--- a/packages/package_info/CHANGELOG.md
+++ b/packages/package_info/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.0+18
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.4.0+17
 
 * Bump the minimum Flutter version to 1.12.13+hotfix.5.
diff --git a/packages/package_info/pubspec.yaml b/packages/package_info/pubspec.yaml
index da39421..251527f 100644
--- a/packages/package_info/pubspec.yaml
+++ b/packages/package_info/pubspec.yaml
@@ -5,7 +5,7 @@
 # 0.4.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.4.0+17
+version: 0.4.0+18
 
 flutter:
   plugin:
@@ -30,5 +30,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/path_provider/path_provider/CHANGELOG.md b/packages/path_provider/path_provider/CHANGELOG.md
index a806dfa..4a94b4c 100644
--- a/packages/path_provider/path_provider/CHANGELOG.md
+++ b/packages/path_provider/path_provider/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.6.8
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.6.7
 
 * Remove Android dependencies fallback.
diff --git a/packages/path_provider/path_provider/pubspec.yaml b/packages/path_provider/path_provider/pubspec.yaml
index 0c36830..28ac774 100644
--- a/packages/path_provider/path_provider/pubspec.yaml
+++ b/packages/path_provider/path_provider/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for getting commonly used locations on the Android &
   iOS file systems, such as the temp and app data directories.
 homepage: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider
-version: 1.6.7
+version: 1.6.8
 
 flutter:
   plugin:
@@ -35,5 +35,5 @@
   plugin_platform_interface: ^1.0.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/path_provider/path_provider_platform_interface/CHANGELOG.md b/packages/path_provider/path_provider_platform_interface/CHANGELOG.md
index d577554..605ab65 100644
--- a/packages/path_provider/path_provider_platform_interface/CHANGELOG.md
+++ b/packages/path_provider/path_provider_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.0.1
 
 * Rename enum to StorageDirectory for backwards compatibility.
diff --git a/packages/path_provider/path_provider_platform_interface/pubspec.yaml b/packages/path_provider/path_provider_platform_interface/pubspec.yaml
index 72f4b20..d872247 100644
--- a/packages/path_provider/path_provider_platform_interface/pubspec.yaml
+++ b/packages/path_provider/path_provider_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.1
+version: 1.0.2
 
 dependencies:
   flutter:
@@ -19,5 +19,5 @@
   test: any
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.10.0 <2.0.0"
diff --git a/packages/quick_actions/CHANGELOG.md b/packages/quick_actions/CHANGELOG.md
index e086407..9c76245 100644
--- a/packages/quick_actions/CHANGELOG.md
+++ b/packages/quick_actions/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.0+5
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.4.0+4
 
 * Bump the minimum Flutter version to 1.12.13+hotfix.5.
diff --git a/packages/quick_actions/pubspec.yaml b/packages/quick_actions/pubspec.yaml
index a28d715..c9155b6 100644
--- a/packages/quick_actions/pubspec.yaml
+++ b/packages/quick_actions/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for creating shortcuts on home screen, also known as
   Quick Actions on iOS and App Shortcuts on Android.
 homepage: https://github.com/flutter/plugins/tree/master/packages/quick_actions
-version: 0.4.0+4
+version: 0.4.0+5
 
 flutter:
   plugin:
@@ -27,5 +27,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/sensors/CHANGELOG.md b/packages/sensors/CHANGELOG.md
index c646747..1e9d172 100644
--- a/packages/sensors/CHANGELOG.md
+++ b/packages/sensors/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.4.2+1
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.4.2
 
 * Remove Android dependencies fallback.
diff --git a/packages/sensors/pubspec.yaml b/packages/sensors/pubspec.yaml
index 0321bce..6b08564 100644
--- a/packages/sensors/pubspec.yaml
+++ b/packages/sensors/pubspec.yaml
@@ -5,7 +5,7 @@
 # 0.4.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.4.2
+version: 0.4.2+1
 
 flutter:
   plugin:
@@ -29,5 +29,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0<3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/share/CHANGELOG.md b/packages/share/CHANGELOG.md
index 677a864..d77b96a 100644
--- a/packages/share/CHANGELOG.md
+++ b/packages/share/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.6.4+2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.6.4+1
 
 * Declare API stability and compatibility with `1.0.0` (more details at: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0).
diff --git a/packages/share/pubspec.yaml b/packages/share/pubspec.yaml
index 628bc80..9a944e3 100644
--- a/packages/share/pubspec.yaml
+++ b/packages/share/pubspec.yaml
@@ -5,7 +5,7 @@
 # 0.6.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.6.4+1
+version: 0.6.4+2
 
 flutter:
   plugin:
@@ -30,5 +30,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/shared_preferences/shared_preferences/CHANGELOG.md b/packages/shared_preferences/shared_preferences/CHANGELOG.md
index 7f374cb..e8c1d1d 100644
--- a/packages/shared_preferences/shared_preferences/CHANGELOG.md
+++ b/packages/shared_preferences/shared_preferences/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.5.7+2
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.5.7+1
 
 * Declare API stability and compatibility with `1.0.0` (more details at: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0).
diff --git a/packages/shared_preferences/shared_preferences/pubspec.yaml b/packages/shared_preferences/shared_preferences/pubspec.yaml
index e86b05b..3cab4b0 100644
--- a/packages/shared_preferences/shared_preferences/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences/pubspec.yaml
@@ -5,7 +5,7 @@
 # 0.5.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.5.7+1
+version: 0.5.7+2
 
 flutter:
   plugin:
@@ -43,5 +43,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/shared_preferences/shared_preferences_platform_interface/CHANGELOG.md b/packages/shared_preferences/shared_preferences_platform_interface/CHANGELOG.md
index 9cbca88..5fe7b18 100644
--- a/packages/shared_preferences/shared_preferences_platform_interface/CHANGELOG.md
+++ b/packages/shared_preferences/shared_preferences_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.4
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.0.3
 
 * Make the pedantic dev_dependency explicit.
diff --git a/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml b/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml
index e321889..3b8f2bf 100644
--- a/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_platform_interface/pubspec.yaml
@@ -1,7 +1,7 @@
 name: shared_preferences_platform_interface
 description: A common platform interface for the shared_preferences plugin.
 homepage: https://github.com/flutter/plugins/tree/master/packages/shared_preferences/shared_preferences_platform_interface
-version: 1.0.3
+version: 1.0.4
 
 dependencies:
   meta: ^1.0.4
@@ -14,5 +14,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.8 <2.0.0"
diff --git a/packages/shared_preferences/shared_preferences_web/CHANGELOG.md b/packages/shared_preferences/shared_preferences_web/CHANGELOG.md
index 251d3a6..71e14ff 100644
--- a/packages/shared_preferences/shared_preferences_web/CHANGELOG.md
+++ b/packages/shared_preferences/shared_preferences_web/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.2+6
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.1.2+5
 
 * Declare API stability and compatibility with `1.0.0` (more details at: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0).
diff --git a/packages/shared_preferences/shared_preferences_web/pubspec.yaml b/packages/shared_preferences/shared_preferences_web/pubspec.yaml
index 2340a38..f50eb24 100644
--- a/packages/shared_preferences/shared_preferences_web/pubspec.yaml
+++ b/packages/shared_preferences/shared_preferences_web/pubspec.yaml
@@ -4,7 +4,7 @@
 # 0.1.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.1.2+5
+version: 0.1.2+6
 
 flutter:
   plugin:
@@ -27,5 +27,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.4 <2.0.0"
diff --git a/packages/url_launcher/url_launcher/CHANGELOG.md b/packages/url_launcher/url_launcher/CHANGELOG.md
index b3bdcdc..5c826e6 100644
--- a/packages/url_launcher/url_launcher/CHANGELOG.md
+++ b/packages/url_launcher/url_launcher/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 5.4.7
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 5.4.6
 
 * Add `web` to the example app.
diff --git a/packages/url_launcher/url_launcher/pubspec.yaml b/packages/url_launcher/url_launcher/pubspec.yaml
index aeff4eb..d038c41 100644
--- a/packages/url_launcher/url_launcher/pubspec.yaml
+++ b/packages/url_launcher/url_launcher/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Flutter plugin for launching a URL on Android and iOS. Supports
   web, phone, SMS, and email schemes.
 homepage: https://github.com/flutter/plugins/tree/master/packages/url_launcher/url_launcher
-version: 5.4.6
+version: 5.4.7
 
 flutter:
   plugin:
@@ -38,5 +38,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.12.13+hotfix.5 <2.0.0"
diff --git a/packages/url_launcher/url_launcher_platform_interface/CHANGELOG.md b/packages/url_launcher/url_launcher_platform_interface/CHANGELOG.md
index 592102f..8766d7a 100644
--- a/packages/url_launcher/url_launcher_platform_interface/CHANGELOG.md
+++ b/packages/url_launcher/url_launcher_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.7
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 1.0.6
 
 * Make the pedantic dev_dependency explicit.
diff --git a/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml b/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml
index 806c967..4486134 100644
--- a/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@
 homepage: https://github.com/flutter/plugins/tree/master/packages/url_launcher/url_launcher_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.6
+version: 1.0.7
 
 dependencies:
   flutter:
@@ -18,5 +18,5 @@
   pedantic: ^1.8.0
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.9.1+hotfix.4 <2.0.0"
diff --git a/packages/url_launcher/url_launcher_web/CHANGELOG.md b/packages/url_launcher/url_launcher_web/CHANGELOG.md
index e6702bd..0702685 100644
--- a/packages/url_launcher/url_launcher_web/CHANGELOG.md
+++ b/packages/url_launcher/url_launcher_web/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.1.1+5
+
+* Update lower bound of dart dependency to 2.1.0.
+
 # 0.1.1+4
 
 * Declare API stability and compatibility with `1.0.0` (more details at: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0).
diff --git a/packages/url_launcher/url_launcher_web/pubspec.yaml b/packages/url_launcher/url_launcher_web/pubspec.yaml
index 08b57aa..16bc4a5 100644
--- a/packages/url_launcher/url_launcher_web/pubspec.yaml
+++ b/packages/url_launcher/url_launcher_web/pubspec.yaml
@@ -4,7 +4,7 @@
 # 0.1.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.1.1+4
+version: 0.1.1+5
 
 flutter:
   plugin:
@@ -30,5 +30,5 @@
   mockito: ^4.1.1
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.1.0 <3.0.0"
   flutter: ">=1.10.0 <2.0.0"