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>

Author: dependabot-preview[bot]

package-lock.json

@@ -9,7 +9,7 @@
     "axios": "^0.18.0",
     "cheerio": "^1.0.0-rc.2",
     "cookie-parser": "~1.4.3",
-    "debug": "~2.6.9",
+    "debug": "~4.1.1",
     "express": "~4.17.1",
     "http-errors": "~1.6.2",
     "jade": "~1.11.0",