chore(dev-deps): ⬆️ upgrade execa to v8 (#46)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [execa](https://togithub.com/sindresorhus/execa) | [`7.2.0` -> `8.0.1`](https://renovatebot.com/diffs/npm/execa/7.2.0/8.0.1) | [![age](https://developer.mend.io/api/mc/badges/age/npm/execa/8.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/execa/8.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/execa/7.2.0/8.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/execa/7.2.0/8.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>sindresorhus/execa (execa)</summary>

### [`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. ([#&#8203;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 ([#&#8203;569](https://togithub.com/sindresorhus/execa/issues/569))

</details>

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---

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package.json

@@ -101,7 +101,7 @@
  "eslint-plugin-jsonc": "2.9.0",
  "eslint-plugin-toml": "0.5.0",
  "eslint-plugin-yml": "1.8.0",
- "execa": "7.2.0",
+ "execa": "8.0.1",
  "gacp": "3.0.3",
  "git-remote-origin-url": "4.0.0",
  "git-url-parse": "13.1.0",