chore(deps): update dependency supertest to v7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
supertest	^6.3.3 -> ^7.0.0

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Release Notes

ladjs/supertest (supertest)

### [`v7.0.0`](https://redirect.github.com/ladjs/supertest/releases/tag/v7.0.0) [Compare Source](https://redirect.github.com/ladjs/supertest/compare/v6.3.4...v7.0.0) - Merge pull request [#​834](https://redirect.github.com/ladjs/supertest/issues/834) from Bruception/master [`225118c`](https://redirect.github.com/ladjs/supertest/commit/225118c) - Fix TestAgent not inheriting Agent properties [`f290431`](https://redirect.github.com/ladjs/supertest/commit/f290431) - fix: bump deps, drop Node.js v<14.16.0 [`1e18c20`](https://redirect.github.com/ladjs/supertest/commit/1e18c20)

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