TensorFlow Transform 1.15.0

Major Features and Improvements

• Added support for sparse labels in AMI vocabulary computation.

Bug Fixes and Other Changes

• Bumped the Ubuntu version on which tensorflow_transform is tested to 20.04
  (previously was 16.04).
• Explicitly use Keras 2 or `tf_keras`` if Keras 3 is installed.
• Added python 3.11 support.
• Depends on tensorflow 2.15.
• Enable passing tf.saved_model.SaveOptions to model saving functionality.
• Census and sentiment examples updated to only use Keras instead of
  estimator.
• Depends on apache-beam[gcp]>=2.53.0,<3 for Python 3.11 and on
  apache-beam[gcp]>=2.47.0,<3 for 3.9 and 3.10.
• Depends on protobuf>=4.25.2,<5 for Python 3.11 and on protobuf>3.20.3,<5
  for 3.9 and 3.10.

Breaking Changes

• Existing analyzer cache is automatically invalidated.

Deprecations

• Deprecated python 3.8 support.