chore(deps): update dependency textlint to v12

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
textlint	11.9.1 -> 12.0.0

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Release Notes

textlint/textlint

### [`v12.0.0`](https://togithub.com/textlint/textlint/blob/master/CHANGELOG.md#​1200-httpsgithubcomtextlinttextlintcomparev1200-beta1v1200-2021-05-24) [Compare Source](https://togithub.com/textlint/textlint/compare/textlint@11.9.1...v12.0.0) ##### Features - **ast-tester:** improve error message ([#​783](https://togithub.com/textlint/textlint/issues/783)) ([e1062c2](https://togithub.com/textlint/textlint/commit/e1062c2d2a491b808f5c25daec98942acbc41f43)) - **kernel:** add runtime AST check if running in textlint-tester ([#​784](https://togithub.com/textlint/textlint/issues/784)) ([6ea0507](https://togithub.com/textlint/textlint/commit/6ea0507eb1357be9c55938c9d8ae30d2f6ce9e3c))

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