Added support for PostgreSQL 14.

Author: dblock

.github/workflows/test-postgresql.yml

@@ -9,6 +9,7 @@ jobs:
         entry:
           - { ruby: 2.6.2, postgresql: 11 }
           - { ruby: 3.1.1, postgresql: 11 }
+          - { ruby: 3.1.1, postgresql: 14 }
     name: test (ruby=${{ matrix.entry.ruby }}, postgresql=${{ matrix.entry.postgresql }})
     steps:
       - uses: actions/checkout@v2

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 * [#145](https://github.com/slack-ruby/slack-ruby-bot-server/pull/145): Added support for Ruby 3.1 - [@dblock](https://github.com/dblock).
 * [#146](https://github.com/slack-ruby/slack-ruby-bot-server/pull/146): Added support for MongoDB 5.0 - [@dblock](https://github.com/dblock).
+* [#147](https://github.com/slack-ruby/slack-ruby-bot-server/pull/147): Added support for PostgreSQL 14 - [@dblock](https://github.com/dblock).
 * Your contribution here.
 
 #### 1.2.1 (2022/03/06)