Bump express from 4.16.3 to 4.17.3

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](expressjs/express@4.16.3...4.17.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -32,7 +32,7 @@
   "dependencies": {
     "body-parser": "1.18.3",
     "custom-protocol-check": "1.4.0",
-    "express": "4.16.3",
+    "express": "4.17.3",
     "helmet": "3.23.3",
     "i18n-iso-countries": "6.1.0",
     "rollbar": "2.19.3"