Resolve Ruby 3.2 "undefining the allocator of T_DATA class" warnings

[BoboFraggins]

warning: undefining the allocator of T_DATA class Ox::Cache
warning: undefining the allocator of T_DATA class Ox::Sax::Value

See: https://bugs.ruby-lang.org/issues/18007

Order of dumped XML elements changed in a test, but I believe the change is not significant.

[ohler55]

Looks like some tests are failing. Would you mind taking a look?

[mtasaka]

I guess this patch may make test suite pass on ruby3.2preview3 and onwards, but this makes test failure on ruby3.1 and downwards.

[ohler55]

Maybe a change in the extconf.rb along with a #if guard in the code would take care of the Ruby API change.

[BoboFraggins]

I updated the test to require both elements be exported, but not to depend on the order of the elements.

[BoboFraggins]

I'm happy to put an #if guard in, if you prefer that as a solution. Just let me know.

[ohler55]

Ox does need to work with older Rubies as well so unless you can get it to work in some other way the #if is needed. Well there are other ways but that is the simplest I think.

[BoboFraggins]

Yeah, sorry. Not enough coffee this morning. How does this look? I tested with 3.2-rc1, 3.1.3 and 2.7.6.

[ohler55]

Kicked off the CI to see how it fares.

[ohler55]

LGTM

[ohler55]

Thanks. It's nice to have others helping out.