chore(deps): update dependency @types/supertest to v6 (#782)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
|
[@types/supertest](https://togithub.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/supertest)
([source](https://togithub.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/supertest))
| [`^2.0.16` ->
`^6.0.0`](https://renovatebot.com/diffs/npm/@types%2fsupertest/2.0.16/6.0.2)
|
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|
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|
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|
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package-lock.json

@@ -57,7 +57,7 @@
     "@nestjs/testing": "^10.2.10",
     "@openfeature/core": "*",
     "@openfeature/server-sdk": "*",
-    "@types/supertest": "^2.0.16",
+    "@types/supertest": "^6.0.0",
     "supertest": "^6.3.3"
   }
 }