build(deps-dev): 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]>

package.json

@@ -122,7 +122,7 @@
     "ngx-build-plus": "^14.0.0",
     "ngx-translate-testing": "^6.1.0",
     "postcss": "8.4.23",
-    "postcss-import": "~15.1.0",
+    "postcss-import": "~16.0.0",
     "postcss-preset-env": "~9.3.0",
     "postcss-url": "~10.1.3",
     "prettier": "^2.8.8",