Merge pull request cloudfoundry#1671 from cloudfoundry/dependabot/bundler/pg-1.2.3

Bump pg from 1.0.0 to 1.2.3


[Finishes #173114385]

Author: selzoc

Gemfile.lock

@@ -304,7 +304,7 @@ GEM
       parallel
     parser (2.7.1.3)
       ast (~> 2.4.0)
-    pg (1.0.0)
+    pg (1.2.3)
     posix-spawn (0.3.13)
     protobuf (3.6.12)
       activesupport (>= 3.2)