- update to 7.1.7:
* Add support for building against python 3.11 alpha 4.
* Replace use of deprecated PyUnicode APIs with the supported version.
* Add support for more number methods, like matrix and the inplace versions.
* Use IsInstance checking so that derived classes of builtin types can be used.
* Add support for python 3.9 beta 1 changes
* Fix for memory leak caused by wrong ref count on python3 Py::String objects.
* Remove support for supportPrint() etc as the tp_print field is being removed
from python either in 3.8 or 3.9.
* Fix problem with compiling for Python 2 and the _Py_PackageContext symbol.
* Add exception errorType() and errorValue() function to access the type and
value of an exception.
* Add support for Py_LIMITED_API aka PEP-384
- drop python-pycxx-7.0.3-python37.patch python-pycxx-7.0.3-setup.py.patch (upstream)