Bump pg from 1.4.4 to 1.4.5

Bumps [pg](https://github.com/ged/ruby-pg) from 1.4.4 to 1.4.5.
- [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/v1.4.4...v1.4.5)

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

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

Gemfile.lock

@@ -289,7 +289,7 @@ GEM
     parser (3.1.2.1)
       ast (~> 2.4.1)
     path_expander (1.1.1)
-    pg (1.4.4)
+    pg (1.4.5)
     prometheus_exporter (2.0.5)
       webrick
     pry (0.14.1)