Upgraded rubocop-github gem

Author: jasnow

Gemfile.lock

@@ -265,7 +265,7 @@ GEM
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    rubocop-github (0.8.1)
+    rubocop-github (0.9.0)
       rubocop (~> 0.51)
     ruby-prof (0.17.0)
     ruby-progressbar (1.9.0)