fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BODYPARSER-7926860
- https://snyk.io/vuln/SNYK-JS-EXPRESS-7926867
- https://snyk.io/vuln/SNYK-JS-SEND-7926862
- https://snyk.io/vuln/SNYK-JS-SERVESTATIC-7926865

package.json

@@ -68,11 +68,11 @@
     "auth0-extension-express-tools": "2.0.0",
     "auth0-extension-tools": "1.3.2",
     "bluebird": "^3.3.4",
-    "body-parser": "^1.15.0",
+    "body-parser": "^1.20.3",
     "boom": "^2.7.2",
     "comma-separated-values": "^3.6.4",
     "ejs": "^2.4.1",
-    "express": "4.17.0",
+    "express": "4.21.0",
     "formidable": "1.0.17",
     "lodash": "^4.8.2",
     "nconf": "^0.8.4",