Bump rollup-plugin-styles from 3.14.1 to 4.0.0

Bumps [rollup-plugin-styles](https://github.com/Anidetrix/rollup-plugin-styles) from 3.14.1 to 4.0.0.
- [Release notes](https://github.com/Anidetrix/rollup-plugin-styles/releases)
- [Changelog](https://github.com/Anidetrix/rollup-plugin-styles/blob/main/CHANGELOG.md)
- [Commits](https://github.com/Anidetrix/rollup-plugin-styles/compare/v3.14.1...v4.0.0)

---
updated-dependencies:
- dependency-name: rollup-plugin-styles
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -51,7 +51,7 @@
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-serve": "^1.1.0",
-    "rollup-plugin-styles": "^3.14.1",
+    "rollup-plugin-styles": "^4.0.0",
     "rollup-plugin-terser": "^7.0.2",
     "rollup-plugin-typescript2": "^0.31.2",
     "sass": "^1.42.1",