utils/agent_visualizer.py scipy

[Alex2782]

"scipy.misc.imsave" was removed in scipy version 1.3 --> pip install scipy==1.2.1

https://docs.scipy.org/doc/scipy/reference/release.1.3.0.html#scipy-interpolate-changes

and functions from scipy.misc (bytescale, fromimage, imfilter, imread, imresize, imrotate, imsave, imshow, toimage) have been removed.

[yashshrikant99]

SciPy documentation makes it clear that scipy.misc.imread is deprecated and users must switch to imageio.imread.