Switch to GitHub Actions

.github/workflows/ci.yaml

@@ -0,0 +1,28 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version:
+        - '2.5'
+        - '2.6'
+        - '2.7'
+    env:
+      CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true
+    - name: Run tests
+      run: bundle exec rake
+    - name: Report code coverage
+      if: ${{ github.ref == 'refs/heads/master' && matrix.ruby-version == '2.7' }}
+      continue-on-error: true
+      uses: paambaati/codeclimate-action@v3.0.0

README.md

@@ -3,7 +3,7 @@
 http://manageiq.github.io/optimist/
 
 [![Gem Version](https://badge.fury.io/rb/optimist.svg)](http://badge.fury.io/rb/optimist)
-[![Build Status](https://travis-ci.org/ManageIQ/optimist.svg)](https://travis-ci.org/ManageIQ/optimist)
+[![CI](https://github.com/ManageIQ/optimist/actions/workflows/ci.yaml/badge.svg)](https://github.com/ManageIQ/optimist/actions/workflows/ci.yaml)
 [![Code Climate](https://codeclimate.com/github/ManageIQ/optimist/badges/gpa.svg)](https://codeclimate.com/github/ManageIQ/optimist)
 [![Coverage Status](http://img.shields.io/coveralls/ManageIQ/optimist.svg)](https://coveralls.io/r/ManageIQ/optimist)
 [![Dependency Status](https://gemnasium.com/ManageIQ/optimist.svg)](https://gemnasium.com/ManageIQ/optimist)

optimist.gemspec

@@ -33,4 +33,5 @@ specify."
   spec.add_development_dependency "manageiq-style"
   spec.add_development_dependency "minitest",      "~> 5.4.3"
   spec.add_development_dependency "rake",          ">= 10.0"
+  spec.add_development_dependency "simplecov", ">= 0.21.2"
 end