Merge pull request #52 from bastelfreak/ci

Add Ruby 3.3 to CI and cleanup CI config

Author: joshcooper

.github/workflows/rspec_tests.yaml

@@ -13,10 +13,11 @@ jobs:
     strategy:
       matrix:
         cfg:
-          - {os: ubuntu-20.04, ruby: '2.7'}
-          - {os: ubuntu-20.04, ruby: '3.0'}
-          - {os: ubuntu-20.04, ruby: '3.2'}
-          - {os: ubuntu-20.04, ruby: 'jruby-9.4.2'}
+          - {os: ubuntu-22.04, ruby: '2.7'}
+          - {os: ubuntu-22.04, ruby: '3.0'}
+          - {os: ubuntu-22.04, ruby: '3.2'}
+          - {os: ubuntu-22.04, ruby: '3.3'}
+          - {os: ubuntu-22.04, ruby: 'jruby-9.4.2'}
           - {os: windows-2019, ruby: '2.7'}
           - {os: windows-2019, ruby: '3.0'}
           - {os: windows-2019, ruby: '3.2'}
@@ -30,11 +31,7 @@ jobs:
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.cfg.ruby }}
-
-      - name: Update rubygems and install gems
-        run: |
-          gem update --system --silent --no-document
-          bundle config set without packaging
-          bundle install --jobs 4 --retry 3
-      
-      - run: bundle exec rake spec
+          bundler-cache: true
+      - run: bundle exec rake spec
+      - name: Verify gem builds
+        run: gem build --verbose *.gemspec