Merge pull request #161 from treasure-data/dependabot/bundler/rack-2.2.3.1

Bump rack from 2.2.3 to 2.2.3.1

Author: yyuu

Gemfile.lock

@@ -206,7 +206,7 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (4.0.6)
     racc (1.6.0)
-    rack (2.2.3)
+    rack (2.2.3.1)
     rake (13.0.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)