Switch CI from travis to Github Actions

.github/workflows/ruby.yml

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+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: Ruby
+
+on:
+ push:
+ branches: [ master ]
+ pull_request:
+ branches: [ master ]
+
+jobs:
+ test:
+
+ runs-on: ubuntu-latest
+ strategy:
+ matrix:
+ ruby-version: ['2.6', '2.7', '3.0']
+
+ steps:
+ - uses: actions/checkout@v2
+ - name: Set up Ruby
+ # To automatically get bug fixes and new Ruby versions for ruby/setup-ruby,
+ # change this to (see https://github.com/ruby/setup-ruby#versioning):
+ # uses: ruby/setup-ruby@v1
+ uses: ruby/setup-ruby@473e4d8fe5dd94ee328fdfca9f8c9c7afc9dae5e
+ with:
+ ruby-version: ${{ matrix.ruby-version }}
+ bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+ - name: Run tests
+ run: bundle exec rake spec