Update guard-define-call rule for eslint 9 compat

[gracepark]

I was running into some compatibility issues with ESLint 9 for the guard-define-call rule:

ESLint: 9.20.1

TypeError: context.getAncestors is not a function
Occurred while linting
Rule: "wc/guard-define-call"

Tested out the rule update: https://eslint.org/blog/2023/09/preparing-custom-rules-eslint-v9/#context.getancestors() and this looks to fix the issue.

[43081j]

context.sourceCode was introduced in 9.x iirc, so we may not need to do this

pretty sure we have other places where we depend on >=9 too (though happy to be proven wrong!)

[43081j]

left 2 comments but the overall question here is what our effective support is currently

i assumed we already required >=8 basically, maybe even >=9. if we can figure that out, it'll decide if we can simplify your code or not (to just assume those methods exist)

[gracepark]

Ok @43081j that makes sense. I tested this out on our end, and it looks to be working as expected. Thanks!

[43081j]

i double checked and this does seem right 👍

we use context.sourceCode throughout the repo, so we are already depending on >=8.4 (as per package.json too)

and source.getAncestors existed since around then too

[gracepark]

@43081j - thanks! Do you know when the next release will happen?

[43081j]

https://github.com/43081j/eslint-plugin-wc/releases/tag/2.2.1

could you try it out @gracepark and let me know if all is good?

[gracepark]

It works for me, thank you so much @43081j!