PyICU 2.7.1 fails to compile with Visual Studio 2017 due to use of C++20 designated initializers
https://gitlab.pyicu.org/main/pyicu/-/blob/v2.7.1/measureunit.cpp#L1407-1411
Worked around the issue by using
static PyNumberMethods t_measureunit_as_number {};
t_measureunit_as_number.nb_multiply = (binaryfunc) t_measureunit___mul__;
t_measureunit_as_number.nb_power = (ternaryfunc) t_measureunit___pow__;
t_measureunit_as_number.nb_true_divide = (binaryfunc) t_measureunit___truediv__;