feat: add yml script (#66)

Update pull_request.yml

.github/workflows/pull_request.yml

@@ -1 +1,31 @@
-test
+name: Pull Request Automation
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+
+      - name: Install dependencies
+        run: yarn install
+
+      - name: Check for dead code
+        run: yarn run ts-prune
+
+      - name: Clean the code
+        run: yarn clean
+
+      - name: Test pull request changes
+        run: yarn test