chore(deps): update dependency sinon to v21 (#58)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [sinon](https://sinonjs.org/)
([source](https://redirect.github.com/sinonjs/sinon)) | [`20.0.0` ->
`21.0.0`](https://renovatebot.com/diffs/npm/sinon/20.0.0/21.0.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/sinon/21.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/sinon/20.0.0/21.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>sinonjs/sinon (sinon)</summary>

###
[`v21.0.0`](https://redirect.github.com/sinonjs/sinon/blob/HEAD/CHANGES.md#2100)

[Compare
Source](https://redirect.github.com/sinonjs/sinon/compare/v20.0.0...52b0d97a0ff32888a26941325b9dc0a059fdf739)

-
[`fd10f13f`](https://redirect.github.com/sinonjs/sinon/commit/fd10f13f3fed7853dd489dd9e84f28c22df715c2)
chore!: remove assert.failException property
([#&#8203;2659](https://redirect.github.com/sinonjs/sinon/issues/2659))
(Morgan Roderick)
  > This was used for allowing customisation of the thrown error between
> sandboxes and for customisation for integrations (most likely from the
  > days of BusterJS).
  >
  > To my knowledge and what I've been able to find on GitHub, this has
  > never had any *production* use by end users.
  >
  > BREAKING CHANGE: this removes assert.failException from the API

*Released by Morgan Roderick on 2025-06-13.*

</details>

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package-lock.json

@@ -61,7 +61,7 @@
     "mocha": "10.8.2",
     "prettier": "3.6.2",
     "semantic-release": "19.0.5",
-    "sinon": "20.0.0",
+    "sinon": "21.0.0",
     "sinon-chai": "3.7.0",
     "ts-node": "10.9.2",
     "typescript": "4.9.5"