This PR updates the minimal required version of pybind11 from 2.9.0 to 2.10.0. New new version is almost 2.5 years old, which is half a year less than the previous version. This change is necessary to support the changes introduced in #115307, which does not compile with pybind11 v.2.9. Signed-off-by: Ingo Müller <ingomueller@google.com>