Convert CI to GitHub Actions

Author: ekohl

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  - pull_request
+  - push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - "2.5"
+          - "2.6"
+          - "2.7"
+    name: Ruby ${{ matrix.ruby }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install development headers
+        run: sudo apt install libkrb5-dev libldap-dev libsasl2-dev -y
+      - name: Install Ruby ${{ matrix.ruby }}
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run tests
+        run: bundle exec rake test
+      - name: Verify gem builds
+        run: gem build *.gemspec

.travis.yml

@@ -1,5 +1,3 @@
-[![Build Status](https://travis-ci.org/theforeman/smart_proxy_realm_ad_plugin.svg?branch=master)](https://travis-ci.org/theforeman/smart_proxy_realm_ad_plugin)
-
 # Description
 This plugin adds a new realm provider for managing hosts in Active Directory.