Update to 1.25

Upstream changes:
1.25  2021-05-11  XMATH
    - Reformatted this file per CPAN::Changes::Spec
    - Switched from Module::Install to ExtUtils::MakeMaker
    - Fix linker errors with dtrace-enabled perl.

1.24  2021-05-05  XMATH
    - bugfix: copy() no longer produces malformed optrees which under certain
      circumstances crashed perl 5.31.2 and later.  (contributed by TonyC)
    - update for removal of '.' from @INC in perl 5.26.

1.23  2021-04-30  XMATH
    - bugfix: fix aliasing semantic unintentionally being applied to subs
      defined after a parenthesized alias()-expression since perl 5.11.2.

1.22  2021-04-22  XMATH
    - bugfix: use SvCUR_set instead of direct SvCUR assignment to fix
      compilation problems with -DDEBUGGING builds.  (contributed by TonyC)
    - update for parser changes in v5.33.6.  (contributed by TonyC)

(wen)