Update all Angular libs (run update_all.sh).

third_party/pkg/di/lib/annotations.dart

 library di.annotations;
 
 /**
  * Annotation that can be applied to the library declaration listing all
  * types for which type factories should be generated to be used
  * by StaticInjector.
  */
 class Injectables {
   final List<Type> types;
   const Injectables(this.types);
-}
+}
+
+/**
+ * Annotation that can be applied to a class for which type factories
+ * should be generated to be used by StaticInjector.
+ */
+class Injectable {
+  const Injectable();
+}