Pin the analyzer version as a temporary workaround for...

Pin the analyzer version as a temporary workaround for https://github.com/dart-lang/sdk/issues/42163 (#18755)

A recent change to the analyzer package introduced an API incompatibility with
the build_resolvers package.  The analyzer package needs to be pinned to an
older version until this is resolved.

lib/web_ui/pubspec.yaml

@@ -8,6 +8,8 @@ dependencies:
   meta: 1.1.8
 
 dev_dependencies:
+  # Pin the analyzer version as a temporary workaround for https://github.com/dart-lang/sdk/issues/42163
+  analyzer: 0.39.8
   http: 0.12.0+4
   image: 2.1.4
   mockito: 4.1.1