Update module github.com/tdewolff/minify/v2 to v2.9.21

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/tdewolff/minify/v2	require	patch	v2.9.19 -> v2.9.21

---

Release Notes

tdewolff/minify

### [`v2.9.21`](https://togithub.com/tdewolff/minify/releases/v2.9.21) [Compare Source](https://togithub.com/tdewolff/minify/compare/v2.9.20...v2.9.21) - JS: fix grouped statement ending parenthesis for objects, fixes [#​429](https://togithub.com/tdewolff/minify/issues/429) ### [`v2.9.20`](https://togithub.com/tdewolff/minify/releases/v2.9.20) [Compare Source](https://togithub.com/tdewolff/minify/compare/v2.9.19...v2.9.20) - CSS: fix `@import url(` early-termination and `@import url( )` - HTML: keep space after empty phrasing elements, fixes [#​427](https://togithub.com/tdewolff/minify/issues/427) - JS: fix switch statement optimization, fixes [#​426](https://togithub.com/tdewolff/minify/issues/426) - JS: remove if statement if if-block is empty, fixes [#​428](https://togithub.com/tdewolff/minify/issues/428)

---

Configuration

📅 Schedule: 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 WhiteSource Renovate. View repository job log here.