Add testing workflow, nuke .travis.yml (#108)

.github/workflows/ci.yaml

@@ -0,0 +1,56 @@
+# yamllint disable rule:line-length
+# yamllint disable rule:braces
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+      - master
+
+jobs:
+  tests:
+    name: Testing with Node.js ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version:
+          - '6.x'
+          - '8.x'
+          - '10.x'
+          - '12.x'
+          - '14.x'
+          - '15.x'
+          - '16.x'
+          - '17.x'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Cache dependencies
+        uses: actions/cache@v2
+        with:
+          path: ~/.npm
+          key: npm-${{ matrix.node-version }}-${{ hashFiles('package*.json') }}
+          restore-keys: |
+            npm-${{ matrix.node-version }}-
+
+      - name: Install dependencies
+        run: |
+          npm install --ignore-scripts
+
+      - name: Build
+        run: |
+          npm run build --if-present
+
+      - name: Run tests
+        run: |
+          npm test