Add CI workflow with awesome-lint.

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: Continuous Integration
+
+on: [push]
+
+jobs:
+  awesome-lint:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v1
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v1
+
+    - name: Install awesome-lint
+      run: npm install --global awesome-lint
+
+    - name: Run awesome-lint
+      run: awesome-lint