fix(deps-dev): rollback @vercel/ncc

Version ^0.28.0 causes the action to fail.
Issue reported at vercel/ncc#693

Author: EndBug

lib/index.js

@@ -40,7 +40,7 @@
     "@types/node": "^12.12.54",
     "@typescript-eslint/eslint-plugin": "^4.22.0",
     "@typescript-eslint/parser": "^4.22.0",
-    "@vercel/ncc": "^0.28.3",
+    "@vercel/ncc": "^0.27.0",
     "all-contributors-cli": "^6.20.0",
     "eslint": "^7.24.0",
     "eslint-config-prettier": "^8.2.0",