Add GHA workflow to run tests against several ruby versions

.github/workflows/run-tests.yml

@@ -0,0 +1,36 @@
+name: Run Tests
+on: push
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        ruby_version: ['2.7', '3.0', '3.1', '3.2']
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Install NSQ
+        shell: bash
+        run: |
+          wget https://github.com/nsqio/nsq/releases/download/v1.2.1/nsq-1.2.1.linux-amd64.go1.16.6.tar.gz
+          tar xvzf nsq-1.2.1.linux-amd64.go1.16.6.tar.gz
+          echo "$GITHUB_WORKSPACE/nsq-1.2.1.linux-amd64.go1.16.6/bin" >> $GITHUB_PATH
+
+      - name: Check NSQ is properly installed
+        shell: bash
+        run: |
+          set -euo pipefail
+          which nsqd
+
+      - name: Check out Git repository
+        uses: actions/checkout@v4
+
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby_version }}
+          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+
+      - name: Run tests
+        shell: bash
+        run: |
+          echo "path: $PATH"
+          bundle exec rspec spec