Add build and test GitHub action triggered on push

Author: voidrender

.github/workflows/push.yml

@@ -0,0 +1,23 @@
+name: Build and test
+
+on: [push]
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+
+        strategy:
+            matrix:
+                node-version: [8.x, 10.x, 12.x]
+
+        steps:
+            - uses: actions/checkout@v2
+            - name: Use Node.js ${{ matrix.node-version }}
+              uses: actions/setup-node@v1
+              with:
+                  node-version: ${{ matrix.node-version }}
+            - run: npm install
+            - run: npm run build --if-present
+            - run: npm test
+              env:
+                  CI: true

package.json

@@ -18,6 +18,7 @@
   "private": false,
   "scripts": {
     "build": "tsc",
+    "test": "echo TODO",
     "clean": "rm -rf dist",
     "preversion": "yarn build",
     "postversion": "git push --tags && yarn publish"