Bump postcss-import from 15.1.0 to 16.0.0

Bumps [postcss-import](https://github.com/postcss/postcss-import) from 15.1.0 to 16.0.0.
- [Release notes](https://github.com/postcss/postcss-import/releases)
- [Changelog](https://github.com/postcss/postcss-import/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-import@15.1.0...16.0.0)

---
updated-dependencies:
- dependency-name: postcss-import
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -42,7 +42,7 @@
     "open-props": "^1.6.16",
     "postcss": "^8.4.32",
     "postcss-cli": "^11.0.0",
-    "postcss-import": "^15.0.0",
+    "postcss-import": "^16.0.0",
     "postcss-jit-props": "^1.0.14",
     "prettier": "^3.1.1",
     "rollup-plugin-esbuild": "^6.1.0"