Log Message:
p5-Sys-SigAction: update to 0.23.

Changes in Sys::SigAction 0.23  10 September 2016

Responding to Bug: https://rt.cpan.org/Public/Bug/Display.html?id=105091

Renamed t/nested.t to t/inline_nested.t (don't execute this on arm platforms
arm perl port appear to be at fault.  See t/inline_nested.t

create new tests:

   t/alternatives.t
   t/recursive_nested.t

Allow arm platforms, but skip t/inline_nested.t with a warning
on arm platforms.

Desupport perl 5.5 (that was soooo long ago > 12 years)... This
allows me to turn on use warnings everywhere: Prompted by the Kwalitee
folks who noticed it was not used.

Set MIN_PERL_VERSION => 5.6.0 in Makefile.PL.

Referenced the new github repository in the generated META.* files.