Make proc_to_ast dependency optional

[viralpraxis]

Resolves #14

[sue445]

#14 says

which does not work well with Ruby 3.4 syntax.

But, all tests on the main branch pass.
https://github.com/rspec-parameterized/rspec-parameterized-core/actions/runs/12527144702/job/34940428274

Please add to your test code what specific syntax causes the error

[viralpraxis]

parser is gradually becoming obsolete due to the new built-in prism parser. As far as I know, it will be deprecated in the long run. And compatibility with newer ruby versions is not guaranteed. Perhaps I should try to resolve the issue on the proc_to_ast's side (by making it aware of prism). If that works out, there won't be any required changes here.

[sue445]

@viralpraxis

parser is gradually becoming obsolete due to the new built-in prism parser

I agree too.

However, the information you wrote does not include the minimum code that reproduces the error (In this case, it will be the test case mentioned in the #15 (review)) or the specific error.

Looking at just this diff, it looks like you are modifying code that works fine.

Therefore I cannot accept your patch.

[viralpraxis]

Yep, your point make sense. I'll close the issue since that's another's gem problem and it should be fixed there. If that does not happen, we can revisit it later.