[conan-center] Validate license with upstream repository

[uilianries]

Tentative, but can not be included to conan center. I'll need to move to a separated hook. It violates the standalone rule, conan-center hook should not depends on networking

closes #389

[SSE4]

@uilianries conflicts, please rebase

[uilianries]

I need to move this hook to a new file, first. Conan Center hook can not depends on networking.