chore(deps): update dependency supertest to v7 (#939)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [supertest](https://togithub.com/ladjs/supertest) | [`^6.3.3` ->
`^7.0.0`](https://renovatebot.com/diffs/npm/supertest/6.3.4/7.0.0) |
[![age](https://developer.mend.io/api/mc/badges/age/npm/supertest/7.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/supertest/7.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/supertest/6.3.4/7.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
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|

---

### Release Notes

<details>
<summary>ladjs/supertest (supertest)</summary>

### [`v7.0.0`](https://togithub.com/ladjs/supertest/releases/tag/v7.0.0)

[Compare
Source](https://togithub.com/ladjs/supertest/compare/v6.3.4...v7.0.0)

- Merge pull request
[#&#8203;834](https://togithub.com/ladjs/supertest/issues/834) from
Bruception/master
[`225118c`](https://togithub.com/ladjs/supertest/commit/225118c)
- Fix TestAgent not inheriting Agent properties
[`f290431`](https://togithub.com/ladjs/supertest/commit/f290431)
- fix: bump deps, drop Node.js v<14.16.0
[`1e18c20`](https://togithub.com/ladjs/supertest/commit/1e18c20)

</details>

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package-lock.json

@@ -58,6 +58,6 @@
     "@openfeature/core": "*",
     "@openfeature/server-sdk": "*",
     "@types/supertest": "^6.0.0",
-    "supertest": "^6.3.3"
+    "supertest": "^7.0.0"
   }
 }