json_serializable: prepare for release (#64)

Author: kevmoo

json_serializable/pubspec.yaml

@@ -1,5 +1,5 @@
 name: json_serializable
-version: 0.2.5-dev
+version: 0.2.5
 author: Dart Team <misc@dartlang.org>
 description: Generates utilities to aid in serializing to/from JSON.
 homepage: https://github.com/dart-lang/json_serializable
@@ -12,7 +12,7 @@ dependencies:
 
   # Use a tight version constraint to ensure that a constraint on
   # `json_annotation`. Properly constrains all features it provides.
-  json_annotation: '>=0.2.0 <0.2.1'
+  json_annotation: '>=0.2.1 <0.2.2'
   path: ^1.3.2
   source_gen: ^0.7.1
 dev_dependencies:
@@ -21,7 +21,3 @@ dev_dependencies:
   collection: ^1.14.0
   dart_style: ^1.0.0
   test: ^0.12.3
-
-dependency_overrides:
-  json_annotation:
-    path: ../json_annotation