cleanup: remove unused devDependency after

Author: Phillip9587

package.json

@@ -15,7 +15,6 @@
     "utils-merge": "1.0.1"
   },
   "devDependencies": {
-    "after": "0.8.2",
     "finalhandler": "1.2.0",
     "mocha": "10.2.0",
     "nyc": "15.1.0",