Bump pg from 1.4.5 to 1.5.2

Bumps [pg](https://github.com/ged/ruby-pg) from 1.4.5 to 1.5.2.
- [Release notes](https://github.com/ged/ruby-pg/releases)
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.md)
- [Commits](ged/ruby-pg@v1.4.5...v1.5.2)

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

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

Author: dependabot[bot]

Gemfile.lock

@@ -170,7 +170,7 @@ GEM
       mime-types
       mimemagic (~> 0.3.0)
       terrapin (~> 0.6.0)
-    pg (1.4.5)
+    pg (1.5.2)
     public_suffix (5.0.1)
     puma (6.1.0)
       nio4r (~> 2.0)