BLD: update the trove classifier to include python 3.8
BLD: update the trove classifier to include python 3.8

da-woods/cython,scoder/cython,da-woods/cython,cython/cython,cython/cython,scoder/cython,scoder/cython,cython/cython,scoder/cython,da-woods/cython,da-woods/cython,cython/cython