Bump pg from 1.2.2 to 1.2.3

Bumps [pg](https://github.com/ged/ruby-pg) from 1.2.2 to 1.2.3.
- [Release notes](https://github.com/ged/ruby-pg/releases)
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.rdoc)
- [Commits](https://github.com/ged/ruby-pg/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile.lock

@@ -244,7 +244,7 @@ GEM
       parallel
     parser (2.7.0.3)
       ast (~> 2.4.0)
-    pg (1.2.2)
+    pg (1.2.3)
     phantomjs (2.1.1.0)
     pry (0.12.2)
       coderay (~> 1.1.0)