Update dependency supertest to v7

Author: renovate[bot]

package.json

@@ -38,7 +38,7 @@
     "grunt": "0.4.5",
     "grunt-contrib-jshint": "1.1.0",
     "restify": "7.7.0",
-    "supertest": "4.0.2",
+    "supertest": "7.1.0",
     "tape": "4.13.2",
     "through": "2.3.8",
     "updtr": "3.1.0",