Merge pull request #200 from mruby/dependabot/bundler/git-1.13.0

Bump git from 1.11.0 to 1.13.0

Author: matz

Gemfile.lock

@@ -33,7 +33,8 @@ GEM
     ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
-    git (1.11.0)
+    git (1.13.0)
+      addressable (~> 2.8)
       rchardet (~> 1.8)
     github-pages (227)
       github-pages-health-check (= 1.17.9)