[camera] Update lower bound of dart dependency to 2.1.0. (#2749)

diff --git a/packages/camera/CHANGELOG.md b/packages/camera/CHANGELOG.md
index 920aa64..379e03d 100644
--- a/packages/camera/CHANGELOG.md
+++ b/packages/camera/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.5.8+1
+
+* Update lower bound of dart dependency to 2.1.0.
+
 ## 0.5.8
 
 * Remove Android dependencies fallback.
diff --git a/packages/camera/pubspec.yaml b/packages/camera/pubspec.yaml
index 2510173..6d70ed7 100644
--- a/packages/camera/pubspec.yaml
+++ b/packages/camera/pubspec.yaml
@@ -2,7 +2,7 @@
 description: A Flutter plugin for getting information about and controlling the
   camera on Android and iOS. Supports previewing the camera feed, capturing images, capturing video,
   and streaming image buffers to dart.
-version: 0.5.8
+version: 0.5.8+1
 
 homepage: https://github.com/flutter/plugins/tree/master/packages/camera
 
@@ -29,5 +29,5 @@
         pluginClass: CameraPlugin
 
 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"