v2.5.0
updated cindex.py submodule to latest version
Add Catch framework for testing embedding support and C++-side features
transparent conversion of dense and sparse Eigen types
Fix the use of MSVC in an MSYS environment (#2087)
Trivial typos
Always use return_value_policy::move for rvalues (#510)
Parse command-line args in a separate function.
Apply c++ standard flag only to files of CXX language. (#1678)
pybind11Tools.cmake: search for Python 3.9