Setup github actions for CI (#1354)

Author: lgebhardt

.github/workflows/ruby.yml

@@ -0,0 +1,62 @@
+name: CI
+
+on:
+  push:
+    branches: [ 'master', 'release-0-8', 'release-0-9', 'release-0-10' ]
+  pull_request:
+    branches: ['**']
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres
+        env:
+          POSTGRES_PASSWORD: password
+          POSTGRES_DB: test
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - 2.6.6
+          - 2.7.2
+          - 3.0.0
+        rails:
+          - 6.1.1
+          - 6.0.3.4
+          - 5.2.4.4
+          - 5.1.7
+        database_url:
+          - postgresql://postgres:password@localhost:5432/test
+          - sqlite3:test_db
+        exclude:
+          - ruby: 3.0.0
+            rails: 6.0.3.4
+          - ruby: 3.0.0
+            rails: 5.2.4.4
+          - ruby: 3.0.0
+            rails: 5.1.7
+          - database_url: postgresql://postgres:password@localhost:5432/test
+            rails: 5.1.7
+    env:
+      RAILS_VERSION: ${{ matrix.rails }}
+      DATABASE_URL: ${{ matrix.database_url }}
+    name: Ruby ${{ matrix.ruby }} Rails ${{ matrix.rails }} DB ${{ matrix.database_url }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+      - name: Install dependencies
+        run: bundle install --jobs 4 --retry 3
+      - name: Run tests
+        run: bundle exec rake test