It seems to build fine using the f21 srpm. (The rawhide srpm complains that perl-ExtUtils-MakeMaker is too old.)
I'm not particularly interested in EPEL branches. Feel free to request and maintain it yourself. When doing so, please, add perl-sig to InitialCC.
This package is very old and there doesn't appear to be a review bug for it. I guess you can request it here.