chore: update dependency execa to v8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
execa	^7.1.1 -> ^8.0.0

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Release Notes

sindresorhus/execa (execa)

### [`v8.0.1`](https://togithub.com/sindresorhus/execa/releases/tag/v8.0.1) [Compare Source](https://togithub.com/sindresorhus/execa/compare/v8.0.0...v8.0.1) ##### Fixes - Fix and document support for the [`{encoding: 'buffer'}` option](https://togithub.com/sindresorhus/execa#encoding). It is the same as `{encoding: null}`, but preferred over it. ([#​572](https://togithub.com/sindresorhus/execa/issues/572)) ### [`v8.0.0`](https://togithub.com/sindresorhus/execa/releases/tag/v8.0.0) [Compare Source](https://togithub.com/sindresorhus/execa/compare/v7.2.0...v8.0.0) ##### Breaking - Require Node.js 16.7.0 and later ([#​569](https://togithub.com/sindresorhus/execa/issues/569)) ### [`v7.2.0`](https://togithub.com/sindresorhus/execa/releases/tag/v7.2.0) [Compare Source](https://togithub.com/sindresorhus/execa/compare/v7.1.1...v7.2.0) - Add `cwd` error property ([#​565](https://togithub.com/sindresorhus/execa/issues/565)) [`f57fdec`](https://togithub.com/sindresorhus/execa/commit/f57fdec)

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