Bump express from 4.16.3 to 4.17.3 in /JavaScript/SimpleRESTapi

Bumps [express](https://github.com/expressjs/express) from 4.16.3 to 4.17.3.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](https://github.com/expressjs/express/compare/4.16.3...4.17.3)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

JavaScript/SimpleRESTapi/package.json

@@ -13,7 +13,7 @@
     "nodemon": "^1.17.5"
   },
   "dependencies": {
-    "express": "^4.16.3",
+    "express": "^4.17.3",
     "mongoose": "^5.1.5"
   }
 }