Merge pull request #260 from ZeusWPI/dependabot/bundler/pg-1.5.7

Bump pg from 1.5.6 to 1.5.7

Author: chvp

Gemfile.lock

@@ -198,7 +198,7 @@ GEM
     parser (3.3.4.0)
       ast (~> 2.4.1)
       racc
-    pg (1.5.6)
+    pg (1.5.7)
     psych (5.1.2)
       stringio
     public_suffix (5.0.4)