Bump debug from 2.6.9 to 4.1.1

Bumps [debug](https://github.com/visionmedia/debug) from 2.6.9 to 4.1.1.
- [Release notes](https://github.com/visionmedia/debug/releases)
- [Commits](debug-js/debug@2.6.9...4.1.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -27,7 +27,7 @@
   },
   "homepage": "https://github.com/Gerhut/kroxy#readme",
   "dependencies": {
-    "debug": "^2.6.0",
+    "debug": "^4.1.1",
     "inflation": "^2.0.0",
     "raw-body": "^2.2.0"
   },