[CHANGES]
- Added List::Util::unpairs() - the inverse of pairs()
- Documentation to pre-warn users about the possible behaviour in a
later version where the pair* higher-order functionals are no longer
transparent to $_
[BUGFIXES]
- Silence some warnings at test time
- Ensure that the List::Util we're loading the XS via is a sufficient
version when Scalar::Util or Sub::Util load it (RT100863)