Update dependency express

Author: mend-for-github-com[bot]

natural-language/JavaScript/sms-sentiment/package.json

@@ -14,6 +14,6 @@
     "@google-cloud/language": "^3.4.0",
     "body-parser": "1.18.3",
     "dotenv": "^6.2.0",
-    "express": "4.16.4"
+    "express": "4.20.0"
   }
 }

speech-to-text/JavaScript/voice-transcription/package.json

@@ -20,7 +20,7 @@
     "@google-cloud/speech": "^2.3.0",
     "body-parser": "^1.18.3",
     "dotenv": "^4.0.0",
-    "express": "^4.16.4",
+    "express": "^4.21.1",
     "express-ws": "^4.0.0",
     "nexmo": "^2.4.0"
   }