Bump express from 4.17.1 to 4.17.3

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:development
...

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

Author: dependabot[bot]

package.json

@@ -58,7 +58,7 @@
     "apollo-server-express": "^2.19.0",
     "ava": "^2.2.0",
     "body-parser": "^1.18.3",
-    "express": "^4.17.1",
+    "express": "^4.17.3",
     "graphql-tag": "^2.10.1",
     "husky": "^0.14.3",
     "jest": "^26.6.3",