fix(deps): update dependency express to v4.20.0 [security] (#349)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [express](http://expressjs.com/)
([source](https://redirect.github.com/expressjs/express)) | [`4.19.2` ->
`4.20.0`](https://renovatebot.com/diffs/npm/express/4.19.2/4.20.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/express/4.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/express/4.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/express/4.19.2/4.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/express/4.19.2/4.20.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

### GitHub Vulnerability Alerts

####
[CVE-2024-43796](https://redirect.github.com/expressjs/express/security/advisories/GHSA-qw6h-vgh9-j6wx)

### Impact

In express <4.20.0, passing untrusted user input - even after sanitizing
it - to `response.redirect()` may execute untrusted code

### Patches

this issue is patched in express 4.20.0

### Workarounds

users are encouraged to upgrade to the patched version of express, but
otherwise can workaround this issue by making sure any untrusted inputs
are safe, ideally by validating them against an explicit allowlist

### Details

successful exploitation of this vector requires the following:

1. The attacker MUST control the input to response.redirect()
1. express MUST NOT redirect before the template appears
1. the browser MUST NOT complete redirection before:
1. the user MUST click on the link in the template

---

### Release Notes

<details>
<summary>expressjs/express (express)</summary>

###
[`v4.20.0`](https://redirect.github.com/expressjs/express/blob/HEAD/History.md#4200--2024-09-10)

[Compare
Source](https://redirect.github.com/expressjs/express/compare/4.19.2...4.20.0)

\==========

-   deps: [email protected]
    -   Remove link renderization in html while redirecting
-   deps: [email protected]
    -   Remove link renderization in html while redirecting
-   deps: [email protected]
    -   add `depth` option to customize the depth level in the parser
- IMPORTANT: The default `depth` level for parsing URL-encoded data is
now `32` (previously was `Infinity`)
-   Remove link renderization in html while using `res.redirect`
-   deps: [email protected]
- Adds support for named matching groups in the routes using a regex
- Adds backtracking protection to parameters without regexes defined
-   deps: encodeurl@~2.0.0
- Removes encoding of `\`, `|`, and `^` to align better with URL spec
- Deprecate passing `options.maxAge` and `options.expires` to
`res.clearCookie`
- Will be ignored in v5, clearCookie will set a cookie with an expires
in the past to instruct clients to delete the cookie

</details>

---

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package.json

@@ -54,7 +54,7 @@
     "clsx": "^1.2.1",
     "eventemitter3": "^5.0.1",
     "events": "^3.3.0",
-    "express": "4.19.2",
+    "express": "4.20.0",
     "express-validator": "^7.0.1",
     "flagsmith": "^3.21.0",
     "flagsmith-nodejs": "^3.2.0",