[path_provider] Bump platform packages to NNBD stable (#3575)

Makes all platform packages stable null-safe releases.
diff --git a/packages/path_provider/path_provider_linux/CHANGELOG.md b/packages/path_provider/path_provider_linux/CHANGELOG.md
index 126aadc..a85c6bb 100644
--- a/packages/path_provider/path_provider_linux/CHANGELOG.md
+++ b/packages/path_provider/path_provider_linux/CHANGELOG.md
@@ -1,8 +1,4 @@
-## 2.0.0-nullsafety
-
-* Update version to (semi-belatedly) meet 1.0-consistency promise.
-
-## 0.2.0-nullsafety
+## 2.0.0
 
 * Migrate to null safety.
 
diff --git a/packages/path_provider/path_provider_linux/example/pubspec.yaml b/packages/path_provider/path_provider_linux/example/pubspec.yaml
index 1fd5571..cb778ef 100644
--- a/packages/path_provider/path_provider_linux/example/pubspec.yaml
+++ b/packages/path_provider/path_provider_linux/example/pubspec.yaml
@@ -3,8 +3,8 @@
 publish_to: "none"
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
-  flutter: ">=1.10.0"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  flutter: ">=1.20.0"
 
 dependencies:
   flutter:
diff --git a/packages/path_provider/path_provider_linux/pubspec.yaml b/packages/path_provider/path_provider_linux/pubspec.yaml
index c6940b1..a3cdff3 100644
--- a/packages/path_provider/path_provider_linux/pubspec.yaml
+++ b/packages/path_provider/path_provider_linux/pubspec.yaml
@@ -1,6 +1,6 @@
 name: path_provider_linux
 description: linux implementation of the path_provider plugin
-version: 2.0.0-nullsafety
+version: 2.0.0
 homepage: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider_linux
 
 flutter:
@@ -11,17 +11,17 @@
         pluginClass: none
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
-  flutter: ">=1.10.0"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  flutter: ">=1.20.0"
 
 dependencies:
-  path: ^1.8.0-nullsafety.3
-  xdg_directories: ^0.2.0-nullsafety.1
-  path_provider_platform_interface: ^2.0.0-nullsafety
+  path: ^1.8.0
+  xdg_directories: ^0.2.0
+  path_provider_platform_interface: ^2.0.0
   flutter:
     sdk: flutter
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  pedantic: ^1.10.0-nullsafety.3
+  pedantic: ^1.10.0
diff --git a/packages/path_provider/path_provider_macos/CHANGELOG.md b/packages/path_provider/path_provider_macos/CHANGELOG.md
index de7ab3e..f989efb 100644
--- a/packages/path_provider/path_provider_macos/CHANGELOG.md
+++ b/packages/path_provider/path_provider_macos/CHANGELOG.md
@@ -1,10 +1,6 @@
-## 2.0.0-nullsafety
+## 2.0.0
 
-* Update version to (semi-belatedly) meet 1.0-consistency promise.
-
-## 0.0.5-nullsafety
-
-* Update Dart SDK constraint for null safety.
+* Update Dart SDK constraint for null safety compatibility.
 
 ## 0.0.4+9
 
diff --git a/packages/path_provider/path_provider_macos/example/pubspec.yaml b/packages/path_provider/path_provider_macos/example/pubspec.yaml
index 4954593..db7fd9a 100644
--- a/packages/path_provider/path_provider_macos/example/pubspec.yaml
+++ b/packages/path_provider/path_provider_macos/example/pubspec.yaml
@@ -11,7 +11,7 @@
     # The example app is bundled with the plugin so we use a path dependency on
     # the parent directory to use the current plugin's version.
     path: ../
-  path_provider_platform_interface: 2.0.0-nullsafety
+  path_provider_platform_interface: ^2.0.0
 
 dev_dependencies:
   integration_test:
@@ -24,5 +24,5 @@
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
-  flutter: ">=1.10.0"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  flutter: ">=1.20.0"
diff --git a/packages/path_provider/path_provider_macos/pubspec.yaml b/packages/path_provider/path_provider_macos/pubspec.yaml
index bab79c2..14f0b95 100644
--- a/packages/path_provider/path_provider_macos/pubspec.yaml
+++ b/packages/path_provider/path_provider_macos/pubspec.yaml
@@ -1,6 +1,6 @@
 name: path_provider_macos
 description: macOS implementation of the path_provider plugin
-version: 2.0.0-nullsafety
+version: 2.0.0
 homepage: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider_macos
 
 flutter:
@@ -10,12 +10,12 @@
         pluginClass: PathProviderPlugin
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
-  flutter: ">=1.10.0"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  flutter: ">=1.20.0"
 
 dependencies:
   flutter:
     sdk: flutter
 
 dev_dependencies:
-  pedantic: ^1.8.0
+  pedantic: ^1.10.0
diff --git a/packages/path_provider/path_provider_platform_interface/pubspec.yaml b/packages/path_provider/path_provider_platform_interface/pubspec.yaml
index 68b7903..3feb4e0 100644
--- a/packages/path_provider/path_provider_platform_interface/pubspec.yaml
+++ b/packages/path_provider/path_provider_platform_interface/pubspec.yaml
@@ -19,4 +19,4 @@
 
 environment:
   sdk: ">=2.12.0-259.9.beta <3.0.0"
-  flutter: ">=1.10.0"
+  flutter: ">=1.20.0"
diff --git a/packages/path_provider/path_provider_windows/CHANGELOG.md b/packages/path_provider/path_provider_windows/CHANGELOG.md
index 2e1701c..ca46214 100644
--- a/packages/path_provider/path_provider_windows/CHANGELOG.md
+++ b/packages/path_provider/path_provider_windows/CHANGELOG.md
@@ -1,21 +1,4 @@
-## 2.0.0-nullsafety
-
-* Update version to (semi-belatedly) meet 1.0-consistency promise.
-
-## 0.1.0-nullsafety.3
-
-* Bump ffi dependency to 1.0.0
-* Bump win32 dependency to 2.0.0-nullsafety.12
-
-## 0.1.0-nullsafety.2
-
-* Bump ffi dependency to 0.3.0-nullsafety.1
-
-## 0.1.0-nullsafety.1
-
-* Bump win32 dependency to latest version.
-
-## 0.1.0-nullsafety
+## 2.0.0
 
 * Migrate to null safety
 
diff --git a/packages/path_provider/path_provider_windows/example/pubspec.yaml b/packages/path_provider/path_provider_windows/example/pubspec.yaml
index 5704502..8c1f88b 100644
--- a/packages/path_provider/path_provider_windows/example/pubspec.yaml
+++ b/packages/path_provider/path_provider_windows/example/pubspec.yaml
@@ -17,11 +17,11 @@
     path: ../../../integration_test
   flutter_driver:
     sdk: flutter
-  pedantic: ^1.8.0
+  pedantic: ^1.10.0
 
 flutter:
   uses-material-design: true
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
-  flutter: ">=1.12.13+hotfix.4"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  flutter: ">=1.20.0"
diff --git a/packages/path_provider/path_provider_windows/pubspec.yaml b/packages/path_provider/path_provider_windows/pubspec.yaml
index eb7d108..d152869 100644
--- a/packages/path_provider/path_provider_windows/pubspec.yaml
+++ b/packages/path_provider/path_provider_windows/pubspec.yaml
@@ -1,7 +1,7 @@
 name: path_provider_windows
 description: Windows implementation of the path_provider plugin
 homepage: https://github.com/flutter/plugins/tree/master/packages/path_provider/path_provider_windows
-version: 2.0.0-nullsafety
+version: 2.0.0
 
 flutter:
   plugin:
@@ -11,19 +11,19 @@
         pluginClass: none
 
 dependencies:
-  path_provider_platform_interface: ^2.0.0-nullsafety
-  meta: ^1.3.0-nullsafety.6
-  path: ^1.8.0-nullsafety.3
+  path_provider_platform_interface: ^2.0.0
+  meta: ^1.3.0
+  path: ^1.8.0
   flutter:
     sdk: flutter
   ffi: ^1.0.0
-  win32: ^2.0.0-nullsafety.12
+  win32: ^2.0.0
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  pedantic: ^1.10.0-nullsafety.3
+  pedantic: ^1.10.0
 
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
-  flutter: ">=1.12.13+hotfix.4"
+  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  flutter: ">=1.20.0"