Update build_runner deps (#877)

Author: kevmoo

_test_yaml/pubspec.yaml

@@ -5,7 +5,7 @@ environment:
   sdk: '>=2.12.0 <3.0.0'
 
 dev_dependencies:
-  build_runner: ^1.0.0
+  build_runner: ^2.0.0
   build_verify: ^2.0.0
   checked_yaml: any
   json_annotation: any

checked_yaml/pubspec.yaml

@@ -14,7 +14,7 @@ dependencies:
   yaml: ^3.0.0
 
 dev_dependencies:
-  build_runner: ^1.0.0
+  build_runner: ^2.0.0
   build_verify: ^2.0.0
   json_serializable: ^4.0.0
   path: ^1.0.0

example/README.md

@@ -8,7 +8,7 @@ dependencies:
   json_annotation: ^4.0.0
 
 dev_dependencies:
-  build_runner: ^1.0.0
+  build_runner: ^2.0.0
   json_serializable: ^4.0.0
 ```
 

example/pubspec.yaml

@@ -8,7 +8,7 @@ dependencies:
   json_annotation: ^4.0.0
 
 dev_dependencies:
-  build_runner: ^1.0.0
+  build_runner: ^2.0.0
 
   # Used by tests. Not required to use `json_serializable`.
   build_verify: ^2.0.0

example/test/readme_test.dart

@@ -28,6 +28,6 @@ dependencies:
   json_annotation: ^4.0.0
 
 dev_dependencies:
-  build_runner: ^1.0.0
+  build_runner: ^2.0.0
   json_serializable: ^4.0.0
 ''';