chore(deps): update postcss packages (major)

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
postcss-cli	^10.0.0 -> ^11.0.0
postcss-import	^15.0.0 -> ^16.0.0

---

Release Notes

postcss/postcss-cli (postcss-cli)

### [`v11.0.0`](https://togithub.com/postcss/postcss-cli/blob/HEAD/CHANGELOG.md#1100--2023-12-05) [Compare Source](https://togithub.com/postcss/postcss-cli/compare/10.1.0...11.0.0) - **BREAKING:** Require Node.js v18+ ([#​464](https://togithub.com/postcss/postcss-cli/pull/464)) - Upgrade to [`postcss-load-config@5`](https://togithub.com/postcss/postcss-load-config/blob/main/CHANGELOG.md#50-2023-11-20) for improved ESM & TS config support ([#​461](https://togithub.com/postcss/postcss-cli/issues/461), [#​462](https://togithub.com/postcss/postcss-cli/pull/462)) ### [`v10.1.0`](https://togithub.com/postcss/postcss-cli/blob/HEAD/CHANGELOG.md#1010--2022-11-29) [Compare Source](https://togithub.com/postcss/postcss-cli/compare/10.0.0...10.1.0) - Allow running `--watch` mode in non-TTY contexts, like Docker ([#​448](https://togithub.com/postcss/postcss-cli/pull/448)) - Update dependencies

postcss/postcss-import (postcss-import)

### [`v16.0.1`](https://togithub.com/postcss/postcss-import/blob/HEAD/CHANGELOG.md#1601--2024-02-14) [Compare Source](https://togithub.com/postcss/postcss-import/compare/16.0.0...16.0.1) - Fix crash when handling some `@import`s with media conditions ([#​557](https://togithub.com/postcss/postcss-import/issues/557), [#​558](https://togithub.com/postcss/postcss-import/pull/558)) ### [`v16.0.0`](https://togithub.com/postcss/postcss-import/blob/HEAD/CHANGELOG.md#1600--2024-01-02) [Compare Source](https://togithub.com/postcss/postcss-import/compare/15.1.0...16.0.0) - **BREAKING:** Require Node.js v18+ ([#​550](https://togithub.com/postcss/postcss-import/issues/550), [#​551](https://togithub.com/postcss/postcss-import/pull/551)) - **BREAKING:** Signifigant rewrite, with small behavioral tweaks in a number of edge cases - Support for `@supports` conditional imports added ([#​532](https://togithub.com/postcss/postcss-import/issues/532), [#​548](https://togithub.com/postcss/postcss-import/pull/548)) - When `skipDuplicates` is `false`, handles import cycles correctly ([#​462](https://togithub.com/postcss/postcss-import/issues/462), [#​535](https://togithub.com/postcss/postcss-import/pull/535)) - Add `warnOnEmpty` option to allow disabling warnings for empty files ([#​84](https://togithub.com/postcss/postcss-import/issues/84), [#​541](https://togithub.com/postcss/postcss-import/pull/541)) - Use proper `node.error`s ([#​518](https://togithub.com/postcss/postcss-import/issues/518), [#​540](https://togithub.com/postcss/postcss-import/pull/540)) Huge thanks to [`@romainmenke`](https://togithub.com/romainmenke) for all the hard work he put into this release.

---

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.

👻 Immortal: This PR will be recreated if closed unmerged. Get config help if that's undesired.

---

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

---

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

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 2fbcc7a):

https://ameba-a11y-guidelines--pr437-renovate-major-postc-5vf55klm.web.app

_{(expires Wed, 13 Mar 2024 06:54:36 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: b5ed0ee52825c395d695adc443890c0775e604f1}

[reg-suit[bot]]

reg-suit detected visual differences.

Check this report, and review them.

:red_circle:

:large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle::large_blue_circle:

What do the circles mean?

The number of circles represent the number of changed images.
:red_circle: : Changed items, :white_circle: : New items, :black_circle: : Deleted items, and :large_blue_circle: Passed items

How can I change the check status?

If reviewers approve this PR, the reg context status will be green automatically.