fix tests

Author: felangel

bricks/dart_frog_prod_server/hooks/build.yaml

@@ -4,7 +4,7 @@ targets:
       source_gen|combining_builder:
         options:
           ignore_for_file:
-            - implicit_dynamic_parameter
+            - type=lint
       json_serializable:
         options:
           create_to_json: false

bricks/dart_frog_prod_server/hooks/lib/src/disable_workspace_resolution.dart

@@ -105,7 +105,11 @@ void writePathDependencyOverrides({
     path.join(projectDirectory, 'pubspec_overrides.yaml'),
   );
   final contents = pubspecOverridesFile.readAsStringSync();
-  final editor = YamlEditor(contents)..update(['dependency_overrides'], {});
+  final overrides = loadYaml(contents) as YamlMap;
+  final editor = YamlEditor(contents);
+  if (!overrides.containsKey('dependency_overrides')) {
+    editor.update(['dependency_overrides'], {});
+  }
   for (final package in pathDependencies) {
     editor.update(
       ['dependency_overrides', package.name],

bricks/dart_frog_prod_server/hooks/lib/src/package_graph/package_graph.g.dart

@@ -16,7 +16,7 @@ dependencies:
   yaml_edit: ^2.2.2
 
 dev_dependencies:
-  build_runner: ^2.8.0
-  json_serializable: ^6.11.1
+  build_runner: ^2.0.0
+  json_serializable: ^6.7.0
   mocktail: ^1.0.0
   test: ^1.25.0