Bump pg from 1.3.0 to 1.3.1 (#165)

Bumps [pg](https://github.com/ged/ruby-pg) from 1.3.0 to 1.3.1.
- [Release notes](https://github.com/ged/ruby-pg/releases)
- [Changelog](https://github.com/ged/ruby-pg/blob/master/History.rdoc)
- [Commits](ged/ruby-pg@v1.3.0...v1.3.1)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -95,7 +95,7 @@ GEM
     parallel (1.21.0)
     parser (3.1.0.0)
       ast (~> 2.4.1)
-    pg (1.3.0)
+    pg (1.3.1)
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)