Address review comments.

Author: davidmorgan

build_runner/pubspec.yaml

@@ -19,7 +19,7 @@ dependencies:
   build: ">=2.1.0 <2.5.0"
   build_config: ">=1.1.0 <1.2.0"
   build_daemon: ^4.0.0
-  build_resolvers: ^2.4.4
+  build_resolvers: ^2.4.4-wip
   build_runner_core: ^8.0.0
   code_builder: ^4.2.0
   collection: ^1.15.0