👷 Replace Travis with GitHub Actions

Author: fabsrc

.github/workflows/main.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version:
+          - "16"
+          - "14"
+          - "12"
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm test