setup.py is missing tensorflow dependency

[HitLuca]

when installing this package, no tensorflow dependency is installed, because it's missing in the setup.py script. Given that it is a mandatory requirement, having it defined and locked to be a version prior to 2.0.0 would solve a bunch of issues

[jfrench206]

x2, would love a fix for this!!

[HitLuca]

Here you are @jfrench206, we just need to wait for a merge now

[seanbow]

Afaik this usually isn't done because tensorflow<2 is split into two versions, tensorflow and tensorflow_gpu, and adding one as a requirement restricts users to one or the other.

[HitLuca]

I reckon that if the package by default uses tensorflow and the user then installs tensorflow_gpu on top of it, the project will use the gpu.