Please update python test

[beew]

I installed libgpuarray and pygpu but the python test won't run since recent versions of numpy have removed nosetester.

libgpuarray 0.7.6

numpy 1.20.3

Ubuntu 20.04

 from numpy.testing.nosetester import NoseTester
ModuleNotFoundError: No module named 'numpy.testing.nosetester

From web search the workaround is to downgrade numpy to 1.16 or something like that, but that is a ridiculous thing to do just in order to run an outdated test suite.