libigl: migrate to Conan v2

[valgur]

• Resolves bump libigl #9469
• Resolves [request] libigl/2.4.0 #9694

[ghost]

I detected other pull requests that are modifying libigl/2.x.x recipe:

• bump libigl #9469

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prs so don't hesitate to report issues/improvements there.

[valgur]

Closing temporarily to avoid unnecessary load on the CI. Will reopen when I'm actively working on the PR again.

[AbrilRBS]

Hi, thanks for this one. As I see, https://libigl.github.io/static-library/ comes in both header-only and static library, we'll need to model that. For an example on how to, fmt's recipe handles a similar case :)

[AbrilRBS]

I've pushed a change to manually override the package_type when header_only - The rest of the PR looks good to me :)

[AbrilRBS]

I lied, now it looks good to me, feel free to take a look and let me know if you agree with my changes @valgur

[valgur]

Looks good, thanks!

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 3 (5b25d6690a9c0e30e04a70c83c309aae14e941a8):

• libigl/2.3.0:
  All packages built successfully! (All logs)

• libigl/2.5.0:
  All packages built successfully! (All logs)

---

Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 3 (5b25d6690a9c0e30e04a70c83c309aae14e941a8):

• libigl/2.3.0:
  All packages built successfully! (All logs)

• libigl/2.5.0:
  All packages built successfully! (All logs)