p5-Set-Object: update to 1.38.

1.38, 2017-11-11

* Add test_cover and release targets

1.37, 2017-11-11

* Test fixes for -Ddefault_inc_excludes_dot, RT #120540
* Skip failing threads test <= 5.10.0
* Add CI hooks

1.36, 2017-11-10

* Davem fixed get-magic for the new arguments, fixing NetHack-Item
L<[perl #132152]|https://rt.perl.org/Public/Bug/Display.html?id=132152>.
See L<[cpan #123582]|https://rt.cpan.org/Ticket/Display.html?id=123582>

* Stabilize F<t/misc/kwalitee.t> test

(wiz)