chore: update build-script for bundlewatch

Author: usefulthink

.github/workflows/bundlewatch.yml

@@ -30,6 +30,6 @@ jobs:
       - uses: actions/checkout@v2
       - uses: jackyef/bundlewatch-gh-action@b9753bc9b3ea458ff21069eaf6206e01e046f0b5
         with:
-          build-script: npm i
+          build-script: npm ci && npm run prepack
           bundlewatch-github-token: ${{ secrets.BUNDLEWATCH_GITHUB_TOKEN }}
           bundlewatch-config: .github/bundlewatch.config.json