Merge pull request #694 from coderdojo-japan/dependabot/bundler/pg-1.2.2

Bump pg from 1.1.4 to 1.2.2

Author: yasulab

Gemfile.lock

@@ -213,7 +213,7 @@ GEM
     nokogiri (1.10.7)
       mini_portile2 (~> 2.4.0)
     os (1.0.1)
-    pg (1.1.4)
+    pg (1.2.2)
     posix-spawn (0.3.13)
     pry (0.12.2)
       coderay (~> 1.1.0)