Switched travis.ci with Github Actions

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: Awesome-(Ro)Bot
+
+on:
+  pull_request:
+    branches: [ '*' ]
+  push:
+    branches: [ '*' ] 
+
+jobs:
+  test:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.0'
+        bundler-cache: true # runs 'bundle install' and caches installed gems automatically
+    - name: Install gem
+      run: gem install awesome_bot
+    - name: Check links
+      run: |
+        awesome_bot README.md --allow-dupe