warnings about deprecated features in the code

[jagottsicher]

getting lots of warnings like:

FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'.
  _np_qint8 = np.dtype([("qint8", np.int8, 1)])

or

WARNING:tensorflow:From /home/jens/Sacred-MNIST/env/lib/python3.6/site-packages/keras/backend/tensorflow_backend.py:4070: The name tf.nn.max_pool is deprecated. Please use tf.nn.max_pool2d instead.

and

WARNING:tensorflow:From /home/jens/Sacred-MNIST/env/lib/python3.6/site-packages/keras/backend/tensorflow_backend.py:422: The name tf.global_variables is deprecated. Please use tf.compat.v1.global_variables instead.

during training using python 3.6.8 (also 3.7.3) and tesnorflow 1.x (dont remember the version, but below 2). I coundt make it to use tensorflow 2 for some reason.