fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-COOKIEJAR-3149984
- https://snyk.io/vuln/SNYK-JS-QS-3153490
- https://snyk.io/vuln/npm:debug:20170905

package.json

@@ -18,7 +18,7 @@
     "mocha": "^8.1.0",
     "morgan": "~1.10.0",
     "should": "^13.2.3",
-    "supertest": "^4.0.2",
+    "supertest": "^7.0.0",
     "tracer": "^1.1.3",
     "twilio": "^3.48.1"
   },