update analyzer and code_transformers version and use mock sdk from code transformers

lib/build/html_import_annotation_recorder.dart

Index: lib/build/html_import_annotation_recorder.dart
diff --git a/lib/build/html_import_annotation_recorder.dart b/lib/build/html_import_annotation_recorder.dart
index c320862bae5138421d926082ffbfcc04d15f6e33..ba5d2abad5a99d35db6753f174c3bfba8e45399a 100644
--- a/lib/build/html_import_annotation_recorder.dart
+++ b/lib/build/html_import_annotation_recorder.dart
@@ -34,6 +34,10 @@ class HtmlImportAnnotationRecorder implements InitializerPlugin {
       type = annotationElement.returnType;
     } else if (annotationElement is PropertyAccessorElement) {
       type = annotationElement.variable.propagatedType;
+      if (type == null) {
+        type = pluginData.resolver.evaluateConstant(annotationElement.library,
+            pluginData.initializer.annotationNode.name).value.type;
+      }
     } else {
       logger.error('Unsupported annotation type. Only constructors and '
           'properties are supported as initializers.');