ci: add test workflow

Author: EndBug

.github/workflows/test.yml

@@ -0,0 +1,22 @@
+name: Test
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Test build
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - run: npm i
+      - run: npm run build
+
+  lint:
+    name: Check linting
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - run: npm i
+      - run: npm run lint