ci: try to configure build & test workflow

.github/workflows/build-test.yml

@@ -0,0 +1,27 @@
+name: Build & Test
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x, 13.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 ci
+      - run: npm run build --if-present
+      - run: npm test
+        env:
+          CI: true

package.json

@@ -31,7 +31,8 @@
     "build": "rm -rf dist && tsc -p tsconfig.json",
     "precommit": "lint-staged",
     "prepublish:npm": "npm run build",
-    "publish:npm": "npm publish --access public"
+    "publish:npm": "npm publish --access public",
+    "test": ""
   },
   "dependencies": {
     "telegraf": "3.36.0"