chore(deps): update dependency postcss-import to v16 (#5381)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [postcss-import](https://togithub.com/postcss/postcss-import) |
[`^15.1.0` ->
`^16.0.0`](https://renovatebot.com/diffs/npm/postcss-import/15.1.0/16.0.0)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/postcss-import/16.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/postcss-import/16.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/postcss-import/15.1.0/16.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/postcss-import/15.1.0/16.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>postcss/postcss-import (postcss-import)</summary>

###
[`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+
([#&#8203;550](https://togithub.com/postcss/postcss-import/issues/550),
[#&#8203;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
([#&#8203;532](https://togithub.com/postcss/postcss-import/issues/532),
[#&#8203;548](https://togithub.com/postcss/postcss-import/pull/548))
- When `skipDuplicates` is `false`, handles import cycles correctly
([#&#8203;462](https://togithub.com/postcss/postcss-import/issues/462),
[#&#8203;535](https://togithub.com/postcss/postcss-import/pull/535))
- Add `warnOnEmpty` option to allow disabling warnings for empty files
([#&#8203;84](https://togithub.com/postcss/postcss-import/issues/84),
[#&#8203;541](https://togithub.com/postcss/postcss-import/pull/541))
- Use proper `node.error`s
([#&#8203;518](https://togithub.com/postcss/postcss-import/issues/518),
[#&#8203;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.

</details>

---

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---

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---

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package.json

@@ -82,7 +82,7 @@
     "npm-run-all": "^4.1.5",
     "postcss": "^8.4.25",
     "postcss-cli": "^11.0.0",
-    "postcss-import": "^15.1.0",
+    "postcss-import": "^16.0.0",
     "postcss-modules": "^6.0.0",
     "prettier": "^3.0.0",
     "react-textarea-autosize": "^8.5.3",

yarn.lock

@@ -18612,16 +18612,16 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss-import@npm:^15.1.0":
-  version: 15.1.0
-  resolution: "postcss-import@npm:15.1.0"
+"postcss-import@npm:^16.0.0":
+  version: 16.0.0
+  resolution: "postcss-import@npm:16.0.0"
   dependencies:
     postcss-value-parser: "npm:^4.0.0"
     read-cache: "npm:^1.0.0"
     resolve: "npm:^1.1.7"
   peerDependencies:
     postcss: ^8.0.0
-  checksum: 518aee5c83ea6940e890b0be675a2588db68b2582319f48c3b4e06535a50ea6ee45f7e63e4309f8754473245c47a0372632378d1d73d901310f295a92f26f17b
+  checksum: 7e9eccc2744dabdd542ba467b2df562c254d3b9e96b277752dbe525e3a8c47741cbbe802b40f64cbe92bc839244c2645cd0284ddb2938f8f38f2271fa427c932
   languageName: node
   linkType: hard
 
@@ -22391,7 +22391,7 @@ __metadata:
     npm-run-all: "npm:^4.1.5"
     postcss: "npm:^8.4.25"
     postcss-cli: "npm:^11.0.0"
-    postcss-import: "npm:^15.1.0"
+    postcss-import: "npm:^16.0.0"
     postcss-modules: "npm:^6.0.0"
     prettier: "npm:^3.0.0"
     react: "npm:18.2.0"