Update dependency prettier to ~2.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
prettier (source)	~2.3.0 -> ~2.4.0

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Release Notes

prettier/prettier

### [`v2.4.1`](https://togithub.com/prettier/prettier/blob/master/CHANGELOG.md#​241) [Compare Source](https://togithub.com/prettier/prettier/compare/2.4.0...2.4.1) [diff](https://togithub.com/prettier/prettier/compare/2.4.0...2.4.1) ##### Fix wildcard syntax in `@forward` ([#​11482](https://togithub.com/prettier/prettier/pull/11482)) ([#​11487](https://togithub.com/prettier/prettier/pull/11487) by [@​niksy](https://togithub.com/niksy)) ```scss // Input @​forward "library" as btn-*; // Prettier 2.4.0 @​forward "library" as btn- *; // Prettier 2.4.1 @​forward "library" as btn-*; ``` ##### Add new CLI option `debug-print-ast` ([#​11514](https://togithub.com/prettier/prettier/pull/11514) by [@​sosukesuzuki](https://togithub.com/sosukesuzuki)) A new `--debug-print-ast` CLI flag for debugging. ### [`v2.4.0`](https://togithub.com/prettier/prettier/blob/master/CHANGELOG.md#​240) [Compare Source](https://togithub.com/prettier/prettier/compare/2.3.2...2.4.0) [diff](https://togithub.com/prettier/prettier/compare/2.3.2...2.4.0) 🔗 [Release Notes](https://prettier.io/blog/2021/09/09/2.4.0.html)

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