Move to github workflows.

Author: arscan

.github/workflows/ruby.yml

@@ -0,0 +1,26 @@
+name: Ruby
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: ['2.6', '2.7']
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Run tests
+      run: bundle exec rake
+    - name: Rubocop
+      run: bundle exec rubocop

.travis.yml

@@ -19,7 +19,7 @@ task :rubocop do
   RuboCop::RakeTask.new
 end
 
-task test: [:rubocop] do
+task :test do
   system('open coverage/index.html')
 end