test for prettier (#43)

Author: seveibar

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+name: Test
+on: ["push", "pull_request"]
+jobs:
+  test:
+    if: "!contains(github.event.head_commit.message, 'skip ci')"
+    name: Test
+    runs-on: ubuntu-18.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12
+      - name: Run Prettier Test
+        run: npx prettier --check "src/**/*.js"