chore(deps-dev): bump postcss-import from 14.1.0 to 15.0.0 (#495)

Bumps [postcss-import](https://github.com/postcss/postcss-import) from 14.1.0 to 15.0.0.
- [Release notes](https://github.com/postcss/postcss-import/releases)
- [Changelog](https://github.com/postcss/postcss-import/blob/master/CHANGELOG.md)
- [Commits](postcss/postcss-import@14.1.0...15.0.0)

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

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -91,7 +91,7 @@
         "mocha": "^10.0.0",
         "postcss": "^8.4.14",
         "postcss-cli": "^10.0.0",
-        "postcss-import": "^14.1.0",
+        "postcss-import": "^15.0.0",
         "prettier": "^2.7.1",
         "react": "^18.2.0",
         "react-dom": "^18.2.0",