leave off the version if it is 0
pass listref for AUTHOR; requires EUMM 6.5702, so do not do this unless something else already requires this version
Dist-Zilla-Plugin-MakeMaker-Awesome-0.30

   - use a listref for AUTHOR argument to WriteMakefile(), but only when the
     EUMM version available is already high enough to accomodate it
use lower perl prereqs in tests to avoid failing when running Makefile.PL on 5.8.x
Dist-Zilla-Plugin-MakeMaker-Awesome-0.31

   - fix failing tests on 5.8.x