ci: replace Travis with GitHub Actions

To have consistency I'm moving the different CIs slowly to GitHub Actions. It works better with our
permissioning models. Long term we'll add publishing to this as well

Author: dkundel

.github/workflows/nodejs.yml

@@ -0,0 +1,26 @@
+name: Node CI
+
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest, windows-latest, ubuntu-latest]
+        node-version: [10, 12, 14]
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: npm install, build, and test
+        run: |
+          npm install
+          npm run build --if-present
+          npm run test
+        env:
+          CI: true
+          NODE_ENV: test