Merge pull request #226 from mruby/dependabot/bundler/git-2.1.1

Bump git from 2.1.0 to 2.1.1

Author: matz

Gemfile.lock

@@ -41,7 +41,7 @@ GEM
     ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (4.1.0)
-    git (2.1.0)
+    git (2.1.1)
       activesupport (>= 5.0)
       addressable (~> 2.8)
       process_executer (~> 1.1)