Bump pg from 1.4.6 to 1.5.3

Bumps [pg](https://github.com/ged/ruby-pg) from 1.4.6 to 1.5.3.
- [Release notes](https://github.com/ged/ruby-pg/releases)
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.md)
- [Commits](https://github.com/ged/ruby-pg/compare/v1.4.6...v1.5.3)

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

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

Gemfile.lock

@@ -191,7 +191,7 @@ GEM
     parallel (1.22.1)
     parser (3.2.2.0)
       ast (~> 2.4.1)
-    pg (1.4.6)
+    pg (1.5.3)
     puma (6.2.2)
       nio4r (~> 2.0)
     racc (1.6.2)
@@ -367,7 +367,7 @@ DEPENDENCIES
   minitest-stub-const
   mocha
   mysql2 (~> 0.5.5)
-  pg (~> 1.4.6)
+  pg (~> 1.5.3)
   puma (~> 6.2)
   rack-mini-profiler
   rails (~> 6.0.0)