name: build

on: [push]

jobs:
  build:
    runs-on: ubuntu-latest
    
    strategy:
      matrix:
        ruby: ['2.5.x', '2.6.x', '2.7.x']

    steps:
    - uses: actions/checkout@v1
    - name: Set up Ruby
      uses: actions/setup-ruby@v1
      with:
        ruby-version: ${{ matrix.ruby }}
    - name: Build and test with Rake
      run: |
        gem install bundler
        bundle install --jobs 4 --retry 3
        bundle exec rake

Use github actions for CI
Use github actions for CI