migrate to dart 2

Author: VerTiGoEtrex

.gitignore

@@ -6,6 +6,7 @@
 .pub
 packages
 pubspec.lock
+.dart_tool/
 
 # flutter
 build/

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.6.0
+* Migrate to Dart 2
+* Bump dependencies to more recent versions
+
 ## 0.5.0
 
 * **Breaking changes**:

example/example.g.dart

@@ -1,7 +1,7 @@
 # Important: Use "flutter packages get", not "pub get".
 name: flutter_built_redux
 author: David Marne <davemarne@gmail.com>
-version: 0.5.0
+version: 0.6.0
 description: Built_redux provider for Flutter
 homepage: https://github.com/davidmarne/flutter_built_redux
 dependencies:
@@ -11,12 +11,12 @@ dependencies:
   meta: ^1.0.3
 
 dev_dependencies:
-  build_runner: ^0.6.0  
-  built_value: ^5.0.0
-  built_value_generator: ^5.0.0
+  build_runner: ">=0.6.0 <0.11.0"
+  built_value: ">=5.0.0 <7.0.0"
+  built_value_generator: ">=5.0.0 <7.0.0"
   flutter_test:
     sdk: flutter
-  source_gen: ^0.7.0
+  #source_gen: ^0.7.0
 
 environment:
-  sdk: ">=1.19.0 <2.0.0"
+  sdk: ">=2.0.0 <3.0.0"