Disable extended test dependencies also in Py3.8/9 since not all of them are compatible yet.
Disable extended test dependencies also in Py3.8/9 since not all of them are compatible yet.

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