Updating pybind11 to 2.6.0. #443 Features:
- Python 3.9 support
- PyPy2 / PyPy3.6 / PyPy3.7 support
- Warnings on latest AppleClang fixed
- 40% faster accumulator fills, simpler implementation
- Segfaults when passing an object with a throwing repr fixed
- kwargs replaced older workarounds (partially at the moment)
- Using new
py::type
instead ofpybind11::detail
usage - Enhanced CMake support, finds conda and venv now, uses
pybind11_find_import
- Using setuptools support from pybind11 (previously vendored, so benefits have been available since 0.11.0)
Also cleans up SDists a bit. #467