Update to 6.12

Upstream changes:
Changes in Devel::NYTProf 6.12 - 16th Nov 2022

B<There should be no significant differences in the performance of Devel-NYTProf
from that of the previous release.>  This release is primarily focused on
adapting the library to a change in Perl 5 as of release 5.37.6 in November
2022; code contributed by Tony Cook in L<GH 200: support SSNEW*() macros
returning SSize_t instead of
I32|https://github.com/timbunce/devel-nytprof/pull/200>.  Corrections to
errors in documentation contributed by joshnaitis in L<GH 198: Fix typos in
/bin report generators|https://github.com/timbunce/devel-nytprof/pull/198>.
'make' targets dependent on Subversion (former version control system) removed
in L<GH 196|https://github.com/timbunce/devel-nytprof/pull/196>.  CPAN module
Sub::Name added as test-time prerequisite.

(wen)