update Time-HiRes to CPAN version 1.9724

update Time-HiRes to CPAN version 1.9724

- Correct XS parameter list, and therefore prototype, for
  unimplemented-on-this-platform version of clock_nanosleep()
  [rt.cpan.org #68700].
- Declare package variables with "our" rather than "use vars".
- Corresponding to "our" usage, check for minimum Perl version
  5.006.
- Declare module dependencies.

- Remove $ENV{PERL_CORE} logic from test suite, which is no
  longer desired in the core.
- Convert test suite to use Test::More.
- Factor out watchdog code from test suite.
- In test suite, be consistent about using fully-qualified form
  of function names.
- Divide test suite into feature-specific scripts.
- Make ualarm timing test less vulnerable to delay-induced false
  failure, from Dave Mitchell.