Update broken links and replace Travis with Github Actions (#108)

.github/workflows/main.yml

@@ -0,0 +1,18 @@
+name: AwesomeBot
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push or pull request events but only for the master branch
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 2.5.3
+    - run: gem install awesome_bot
+    - run: awesome_bot README.md --allow-dupe --allow-redirect