Consider supporting FCS version 3.2

[joseph-sch]

I have just noticed that FCS standard version 3.2 has been published: https://pubmed.ncbi.nlm.nih.gov/32881398/ or http://flowcyt.sourceforge.net/fcs/fcs32.pdf

It is brand new and non-backward compatible so I don't suggest 'switching' altogether, but we should consider supporting users who will want to transition.

[paulmueller]

I agree. I would be happy to review a PR (including tests). A kwarg fcs_version="3.0" (default for now) or fcs_version="3.2" would probably make sense.

[lin1996-ux]

Is there any chance to use the kwarg fcs_version in fcswrite.write_fcs(), if I need to write numpy data to a .fcs file in FCS2.0 file format?

[paulmueller]

@lin1996-ux version 2.0 is not supported. The keyword fcs_version does not exist yet. Please create a new issue if you need that feature.