Claiming and unretiring python-pybv

[Ben Beasley]

I (FAS: music) plan to adopt the python-pybv package and unretire it in 
F39 and F40/Rawhide. This email provides the required[1] notice. This 
package was retired while orphaned today due to FTI/FTBFS.

I already have a PR that fixes the FTI/FTBFS[2], so I will be able to 
deal with that promptly.

I will add the neuro-sig packager group to the package, as it clearly 
falls within the scope of the NeuroFedora SIG.

[1] 
https://docs.fedoraproject.org/en-US/package-maintainers/Package_Retirement_...

[2] https://src.fedoraproject.org/rpms/python-pybv/pull-request/2