Bump pg from 1.2.3 to 1.3.0

Bumps [pg](https://github.com/ged/ruby-pg) from 1.2.3 to 1.3.0.
- [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/compare/v1.2.3...v1.3.0)

---
updated-dependencies:
- dependency-name: pg
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -308,7 +308,7 @@ GEM
     parser (3.1.0.0)
       ast (~> 2.4.1)
     path_expander (1.1.0)
-    pg (1.2.3)
+    pg (1.3.0)
     prometheus_exporter (1.0.1)
       webrick
     pry (0.13.1)