Ghostrscript/GhostPDL 9.21 Release Candidate 1

I have created archives (and Ghostscript Windows installers) for the
first release candidates for Ghostscript and GhostPDL 9.21, and they are
available here:

https://github.com/ArtifexSoftware/ghostpdl-downloads/releases/tag/9.21rc1

Please give them a try on your system if you're interested in helping
test the release-in-progress. Your feedback is appreciated.

All the best,

Chris