chore(dependencies): restrict maximum tensorflow version to stay below 2.16.0

[dasmy]

Otherwise tf.keras.callbacks.experimental is not available, see https://www.tensorflow.org/api_docs/python/tf/keras/callbacks/experimental/BackupAndRestore

[Kohulan]

Hi @dasmy ,

I was exactly expecting this. I think it should be set to be below 2.15.0.

[dasmy]

Thanks for your comment. As far as I understand the above documentation link above, 2.15 still included the experimental namespace while it was removed in 2.16.

For me, the version including this commit at least does not complain any more on my Mac.
Still did not test end to end as I am currently having other, unrelated difficulties.

A proper fix would have been to require tensorflow>=2.15 and to drop the experimental namespace. However, not knowing the code and potential side-effects very well, I did not dare to try that, yet.

[Kohulan]

Thanks for the information. So far I have trained and tested with TensorFlow==2.15.0 and all does work fine. So I would stick with it for now.