Bump ghostscript from 10.05.1 to 10.06.0
Bumps [ghostscript](https://www.ghostscript.com) from 10.05.1 to 10.06.0.
- [Release notes](https://github.com/ArtifexSoftware/ghostpdl/releases/tag/ghostpdl-10.06.0)
- [Changelog](https://ghostscript.readthedocs.io/en/gs10.06.0/News.html)
- [Commits](https://github.com/ArtifexSoftware/ghostpdl/compare/ghostpdl-10.05.1...ghostpdl-10.06.0)