feat(vars-builder-generator): Adding gql_code_builder vars builder dep

Author: caffeineflo

packages/ferry_test_graphql2/pubspec.yaml

@@ -12,7 +12,7 @@ dependencies:
   ferry_exec: ^0.5.0-dev.0+1
   built_value: ^8.0.4
   built_collection: ^5.0.0
-  gql_code_builder: ^0.9.0
+  gql_code_builder: ^0.10.0
 dev_dependencies:
   test: ^1.16.8
   build_runner: ^2.0.2