chore(deps): update devdependency unbuild to v2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
unbuild	^1.2.1 -> ^2.0.0

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Release Notes

unjs/unbuild (unbuild)

### [`v2.0.0`](https://togithub.com/unjs/unbuild/blob/HEAD/CHANGELOG.md#v200) [Compare Source](https://togithub.com/unjs/unbuild/compare/v1.2.1...v2.0.0) [compare changes](https://togithub.com/unjs/unbuild/compare/v2.0.0-rc.0...v2.0.0) ##### 🏡 Chore - Update dependencies ([33b20a4](https://togithub.com/unjs/unbuild/commit/33b20a4)) - Update depedencies ([8d8a3d7](https://togithub.com/unjs/unbuild/commit/8d8a3d7)) ##### 🤖 CI - Use conventional commit for autofix ([#​294](https://togithub.com/unjs/unbuild/pull/294)) ##### ❤️ Contributors - Pooya Parsa ([@​pi0](http://github.com/pi0)) - Daniel Roe

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