L<threads::shared> 1.14
-=item -
-
-L<Test::Leaner>
-
=back
=item *
load_or_skip_all 'threads', $force ? '0' : '1.67', [ ];
load_or_skip_all 'threads::shared', $force ? '0' : '1.14', [ ];
- require Test::Leaner;
-
diag "Threads testing forced by \$ENV{$force_var}" if $force;
return spawn => \&spawn;