Fix Conan recipes due to update to 1.56.0
Conan updated to 1.56.0. On the way to Conan v2, build_requirements
in Conan recipes will be removed and replaced by 2 distinct attributes, tool_requirements
and test_requirements
. From now on, pybind11
has been put as a requirement but pylene-numpy
will be removed since it has been moved to the pylena repository.