Pod::Parser was only used via Pod::Usage, but it has been ported to only
use Pod::Simple. Versions of Pod::Usage prior to 1.69 still had some
reliance on Pod::Parser in their tests, so bump the Pod::Usage prereq to
the first version that was completely independant.
Pod::Parser was only used via Pod::Usage, but it has been ported to only use Pod::Simple. Versions of Pod::Usage prior to 1.69 still had some reliance on Pod::Parser in their tests, so bump the Pod::Usage prereq to the first version that was completely independant.