Switch Travis to GitHub Actions

.github/workflows/continuous-integration.yml

@@ -0,0 +1,32 @@
+name: Continuous Integration
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+        node-version: [10.x, 12.x, 14.x, 15.x]
+    services:
+      postgres:
+        image: postgres:9.6
+        env:
+          POSTGRES_HOST_AUTH_METHOD: trust
+        ports:
+          - 5432:5432
+    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 install
+      - run: npm test
+        env:
+          PGUSER: postgres