Merge pull request #267 from ohbarye/dependabot/bundler/backend/pg-1.2.3

Bump pg from 1.1.4 to 1.2.3 in /backend

Author: ohbarye

backend/Gemfile.lock

@@ -101,7 +101,7 @@ GEM
     nio4r (2.5.2)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
-    pg (1.1.4)
+    pg (1.2.3)
     public_suffix (4.0.5)
     puma (4.3.5)
       nio4r (~> 2.0)