Replace travis with github actions

.github/workflows/ruby.yml

@@ -0,0 +1,23 @@
+name: Ruby
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ["3.1", "3.2", "3.3"]
+        rails-version: ["6.1.0", "7.0.0", "7.1.0"]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        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
+        run: bundle exec rake
+        env:
+          RAILS_VERSION: ${{ matrix.rails-version }}