Bump express from 4.17.1 to 4.17.3 in /packages/server

Bumps [express](https://github.com/expressjs/express) from 4.17.1 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@4.17.1...4.17.3)

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

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

Author: dependabot[bot]

packages/server/package-lock.json

@@ -15,7 +15,7 @@
     "class-validator": "^0.10.1",
     "connect-redis": "^4.0.3",
     "cors": "^2.8.5",
-    "express": "^4.17.1",
+    "express": "^4.17.3",
     "express-session": "^1.16.2",
     "graphql": "^14.5.8",
     "ioredis": "^4.14.1",