Update Pod::Checker to CPAN version 1.74

Update Pod::Checker to CPAN version 1.74

[DELTA]

+ CPAN#133312: Add strict compliance to Pod-Checker
  Thanks TODDR for the patch to make the code "use strict" compliant
+ CPAN#98326: Can we make “A non-empty Z<>” a warning and not an error
  This is a corner case... and since Pod::Simple anyway "nixes" anything
  inside Z<...>, this is a warning, not an error. Mind the caveats.
+ Added an additional test to achieve 100% statement coverage and added
  some POD to also have 100% POD coverage
+ Made all text files unixish, no CRLF