Migrate to GitHub actions

.github/workflows/publishdocker.yml

@@ -2,6 +2,7 @@ name: Publish Docker
 on: [push]
 jobs:
   build:
+    if: github.repository_owner == 'ytti'
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master

.github/workflows/ruby.yml

@@ -0,0 +1,35 @@
+# 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: CI
+
+on: [ push, pull_request ]
+#  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

README.md

@@ -1,5 +1,5 @@
 # Oxidized
-[![Build Status](https://api.travis-ci.com/ytti/oxidized.svg)](https://travis-ci.com/ytti/oxidized)
+[![Build Status](https://github.com/ytti/oxidized/actions/workflows/ruby.yml/badge.svg)](https://github.com/ytti/oxidized/actions/workflows/ruby.yml)
 [![codecov.io](https://codecov.io/gh/ytti/oxidized/coverage.svg?branch=master)](https://codecov.io/gh/ytti/oxidized?branch=master)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/5a90cb22db6a4d5ea23ad0dfb53fe03a)](https://www.codacy.com/app/ytti/oxidized?utm_source=github.com&utm_medium=referral&utm_content=ytti/oxidized&utm_campaign=Badge_Grade)
 [![Code Climate](https://codeclimate.com/github/ytti/oxidized/badges/gpa.svg)](https://codeclimate.com/github/ytti/oxidized)