tesorflow-addons dependency

[irelamb]

Hello,

thank you very much for developing and maintaining this package! I am using to analyse some mRNA FISH images and it is very useful and simple to use.

Since TensorFlow Addons has stopped development, I was wondering how the package could be adapted to remove the dependency on tensorflow-addons. I think the only place where tensorflow-addons is used is in utils_models.py. probably this line:
self.norm = tfa.layers.InstanceNormalization()
could be replaced by something like
self.norm = GroupNormalization(groups=-1)
from what I read in https://www.tensorflow.org/addons/api_docs/python/tfa/layers/InstanceNormalization. Are you planning to do some modification of this kind?

Best
Irene