4.2.1

@henryiii removed wheel from pyproject.toml: PR #565.

@jpivarski added a rule to skip parsing Float16/Double32 TBranch titles if the title is not parsable (and just assume default number of bits): PR #561. Removed references to deprecated distutils and Pandas Int64Index: PR #564. Removed the rule that interpreted fBits as 1 byte (it's 4 bytes everywhere except in some branches of some Delphes files): PR #570.