FPM::Package#convert now maintains default attrs
FPM::Package#convert now maintains default attrs

FPM::Package#convert no longer discards the default values of the attributes of
the target package.
Instead the attributes of the source package are merged into the default
attributes of the target package.

djhaskin987/fpm,djhaskin987/fpm,djhaskin987/fpm,djhaskin987/fpm