dev-perl/XML-LibXML: Bump to version 2.20.100 re bug #595098

dev-perl/XML-LibXML: Bump to version 2.20.100 re bug #595098

- Bumping because upstream have done some splitting, and now deem
  the problems in bug #595098 to be potentially a problem in one of
  these new dependencies. Whether or not its actually fixed is to be
  seen, but if it isn't, it has to be updated before they'll look at it.

Upstream:
- Mark as working with libxml2 2.9.9 and lower
- Allow LibParser to be provided for all methods
- Portability fixes
- Convert to Alien::Libxml2

Keywords:
- Due to new dependencies, all the following keywords are dropped:
  alpha, {amd64,x86}-{fbsd,linux}, arm{,64}, hppa ia64, m68k-mint, mips
  ppc{,-aix,-macos,64}, riscv s390, sparc{,-solaris,64-solaris}
  {x64,x86}-{macos,solaris}

Bug: https://bugs.gentoo.org/595098
Bug: https://rt.cpan.org/Ticket/Display.html?id=119715
Package-Manager: Portage-2.3.66, Repoman-2.3.16
Signed-off-by: Kent Fredric <kentnl@gentoo.org>