Lint ourselves in CI

.github/workflows/main.yaml

@@ -1,13 +1,25 @@
 name: Node.js Package
 
-on:
-  push:
-    tags:
-      - "v*"
-
+on: push
 
 jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 12
+          registry-url: https://registry.npmjs.org/
+      - run: npm ci
+      - run: npm test
+
   publish-npm:
+    name: Publish
+    if: startsWith(github.ref, 'refs/tags/v')
+    needs: test
+
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2