Update SDK constraints to reflect the fact that set literals are being used (#29389)

dev/bots/pubspec.yaml

@@ -3,7 +3,7 @@ description: Scripts which run on bots.
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   path: 1.6.2

dev/manual_tests/pubspec.yaml

@@ -2,7 +2,7 @@ name: manual_tests
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   flutter:

dev/tools/pubspec.yaml

@@ -3,7 +3,7 @@ description: Various repository development tools for flutter.
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   archive: 2.0.8

examples/flutter_gallery/pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_gallery
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   flutter:

packages/flutter/pubspec.yaml

@@ -5,7 +5,7 @@ homepage: http://flutter.io
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".

packages/flutter_localizations/pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_localizations
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".

packages/flutter_test/pubspec.yaml

@@ -2,7 +2,7 @@ name: flutter_test
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".

packages/flutter_tools/pubspec.yaml

@@ -5,7 +5,7 @@ author: Flutter Authors <flutter-dev@googlegroups.com>
 
 environment:
   # The pub client defaults to an <2.0.0 sdk constraint which we need to explicitly overwrite.
-  sdk: ">=2.0.0-dev.68.0 <3.0.0"
+  sdk: ">=2.2.0 <3.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".