🤖 chore(package.json): Add debug script.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/aureooms/rejuvenate/blob/a5a57b70ac6fd6fb77fdab32e6b7be7519ce9564/src/transforms/package.json:scripts-add-debug.js
Please contact the author of the transform if you believe there was an error.

package.json

@@ -49,6 +49,7 @@
     "build-gh-pages": "npm run build-docs",
     "commit-msg": "commitlint --edit",
     "cover": "c8 --all --src src --reporter=lcov npm test",
+    "debug": "NODE_ENV=debug npm run test -- -st --fail-fast",
     "install-hooks": "husky install",
     "lint-config": "fixpack --dryRun",
     "lint-config-and-fix": "fixpack || fixpack",