fix: package.json & package-lock.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

@@ -13,10 +13,10 @@
   "dependencies": {
     "axios": "^0.24.0",
     "bluebird": "^3.7.2",
-    "body-parser": "^1.20.0",
+    "body-parser": "^1.20.3",
     "cors": "^2.8.5",
     "dotenv": "10.0.0",
-    "express": "^4.17.3",
+    "express": "^4.21.0",
     "ffmpeg-static": "^5.0.0",
     "file-type": "^16.5.3",
     "fs-extra": "^10.1.0",