Try GitHub Actions for CI

Author: sj26

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request: 
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        ruby-version: ['2.6', '2.7', '3.0']
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true
+
+    - uses: actions/setup-node@v2
+
+    - uses: browser-actions/setup-chrome@master
+    - uses: nanasess/setup-chromedriver@master
+
+    - name: Run tests
+      run: bundle exec rake test