fix: webcommon/javascript.nodejs/samples_src/MessagesExpress/package.…

…json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-PATHTOREGEXP-7925106

webcommon/javascript.nodejs/samples_src/MessagesExpress/package.json

@@ -12,7 +12,7 @@
         "body-parser": "~1.10.2",
         "cookie-parser": "~1.3.3",
         "debug": "~2.6.9",
-        "express": "~4.11.1",
+        "express": "~4.20.0",
         "jade": "~1.9.1",
         "morgan": "~1.9.1",
         "bower" : "~1.8.8"