chore(deps-dev): bump supertest from 5.0.0 to 6.0.1

Bumps [supertest](https://github.com/visionmedia/supertest) from 5.0.0 to 6.0.1.
- [Release notes](https://github.com/visionmedia/supertest/releases)
- [Commits](forwardemail/supertest@v5.0.0...v6.0.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -49,7 +49,7 @@
     "gulp-uglify": "^3.0.2",
     "lazypipe": "^1.0.2",
     "mocha": "^8.2.1",
-    "supertest": "^5.0.0"
+    "supertest": "^6.0.1"
   },
   "dependencies": {
     "@neos21/bootstrap3-glyphicons": "^1.0.6",