Add github actions for rspec

.github/workflows/ruby.yaml

@@ -0,0 +1,26 @@
+name: Ruby specs
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Tests for ${{ matrix.ruby.name }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - { name: "Ruby 3.2.x", value: 3.2.0 }
+          - { name: "Ruby 3.1.x", value: 3.1.3 }
+          - { name: "Ruby 3.0.x", value: 3.0.5 }
+          - { name: "Ruby 2.7.x", value: 2.7.7 }
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby.value }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rspec