chore(bloc_test): upgrade to bloc ^8.1.1 (#3723)

Author: felangel

packages/bloc_test/pubspec.yaml

@@ -10,7 +10,7 @@ environment:
   sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
-  bloc: ^8.1.0
+  bloc: ^8.1.1
   diff_match_patch: ^0.4.1
   meta: ^1.3.0
   mocktail: ">=0.2.0 <0.4.0"