Support llvm-sys 181.1.1?

[xbjfk]

Is your feature request related to a problem? Please describe.
this version of llvm-sys contains significant fixes to the build system for Musl and Mac OS

Describe the solution you'd like
update the llvm-sys to 181.1.1

Describe possible drawbacks to your solution
not sure, but one signature has been fixed or maybe some people may depend on the old/broken behavior

Describe alternatives you've considered
N/A

Additional context
N/A

[TheDan64]

Looks like there's actually a 181.2.0, we should update to that

[theoparis]

Can inkwell support LLVM 19 as well?

[stevefan1999-personal]

@TheDan64 any problem with 19.1.0?

[TheDan64]

I'm open to reviewing a PR with support for v19. It is not as simple as a version change. Please open a separate ticket as it is off topic here