chore(deps): update devdependency @vue-macros/volar to ^0.20.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@vue-macros/volar (source)	^0.19.1 -> ^0.20.0

---

Release Notes

vue-macros/vue-macros (@​vue-macros/volar)

### [`v0.20.0`](https://togithub.com/vue-macros/vue-macros/blob/HEAD/packages/volar/CHANGELOG.md#0200) [Compare Source](https://togithub.com/vue-macros/vue-macros/compare/@vue-macros/volar@0.19.1...@vue-macros/volar@0.20.0) ##### Minor Changes - [#​684](https://togithub.com/vue-macros/vue-macros/pull/684) [`1f22091`](https://togithub.com/vue-macros/vue-macros/commit/1f220910fafd9b1e51c4006db030ad64e3762fec) Thanks [@​zhiyuanzmj](https://togithub.com/zhiyuanzmj)! - add define-emit plugin

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.