Add GitHub Actions integration for validation and tests (#1132)

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Run validation
+        run: npm run validate
+
+      - name: Run tests
+        run: npm test

.travis.yml

@@ -1,5 +0,0 @@
-language: node_js
-
-before_script: npm install
-
-script: npm run validate && npm test