Support Python 3.10.
Support Python 3.10.

Since Python 3.7, C module interface was extended to allow
size argument of formats that use '#' in PyArg_ParseTuple()
and Py_BuildValue() functions to be of Py_ssize_t type
instead of int, but only if PY_SSIZE_T_CLEAN macro is defined
before including <Python.h> include file.

Since Python 3.10, this is a requirement:
PY_SSIZE_T_CLEAN must be defined,
int is no longer allowed as size argument.

Signed-off-by: Oleg Girko <665b39a1e96a9a15fc99f73183af3f04bf8111eb@infoserver.lv>

dashpay/dash_hash,dashpay/dash_hash,dashpay/dash_hash