fix(deps): update dependency postcss to v8.4.42 (#284)

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| npm        | postcss | 8.4.41 | 8.4.42 |

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Calvin Wilkinson <calvin.wilkinson@gmail.com>