Merge pull request #947 from rubycentral/dependabot/bundler/stateful_enum-0.9.0

Bump stateful_enum from 0.8.0 to 0.9.0

Author: amatsuda

Gemfile.lock

@@ -428,7 +428,7 @@ GEM
     snaky_hash (2.0.1)
       hashie
       version_gem (~> 1.1, >= 1.1.1)
-    stateful_enum (0.8.0)
+    stateful_enum (0.9.0)
     stringio (3.2.0)
     temple (0.10.4)
     thor (1.4.0)