Bump express from 4.18.2 to 4.18.3 (#26)

Bumps [express](https://github.com/expressjs/express) from 4.18.2 to 4.18.3.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.18.2...4.18.3)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -4,7 +4,7 @@
   "description": "Audio visualisation of the Zooniverse event streams",
   "main": "index.html",
   "devDependencies": {
-    "express": "^4.13.4"
+    "express": "^4.18.3"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",