chore(src/CMakeLists): expose LEAN_IGNORE_OLEAN_VERSION as cmake option CHECK_OLEAN_VERSION
chore(src/CMakeLists): expose LEAN_IGNORE_OLEAN_VERSION as cmake option CHECK_OLEAN_VERSION

leodemoura/lean,dselsam/lean,leanprover-community/lean,leanprover/lean,Kha/lean,leodemoura/lean,leodemoura/lean,fpvandoorn/lean,leanprover/lean,leanprover/lean,Kha/lean,dselsam/lean,dselsam/lean,fpvandoorn/lean,fpvandoorn/lean,dselsam/lean,leanprover-community/lean,leanprover-community/lean,leodemoura/lean,fpvandoorn/lean,Kha/lean,dselsam/lean,leanprover-community/lean,digama0/lean,digama0/lean,fpvandoorn/lean,Kha/lean,leanprover-community/lean,dselsam/lean,Kha/lean,leanprover-community/lean,digama0/lean,digama0/lean,leanprover/lean,leodemoura/lean,leodemoura/lean,leanprover/lean,fpvandoorn/lean,Kha/lean,leanprover/lean,digama0/lean,digama0/lean