Merge pull request #528 from test-kitchen/github_actions

Test on Ruby 3.0 and cache gems

.github/workflows/ci.yml

@@ -1,27 +1,22 @@
 name: CI
+
 on:
-  push:
-    branches:
-    - master
   pull_request:
+  push:
     branches:
-    - master
+      - master
 
 jobs:
-  build:
+  test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '2.4', '2.5', '2.6', '2.7' ]
+        ruby: [ '2.5', '2.6', '2.7', '3.0']
     name: Lint & Test with Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-ruby@v1
+      - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
-      - name: Setup Ruby environment
-        run: |
-          gem install bundler
-          bundle install --jobs 4 --retry 3
-      - name: Testing & Linting
-        run: bundle exec rake
+          bundler-cache: true
+      - run: bundle exec rake