TensorFlow Federated 0.60.0

Release 0.60.0

Major Features and Improvements

• DTensor TF executor is now integrated with the default TFF C++ worker.
• Added federated program documentation and guidelines.
• Removed the pytype dependency from TFF.
• tff.learning.algorithms.build_fed_recon_eval now supports TFF optimizers.

Breaking Changes

• Updated tff.types.deserialize_type to not accept/return None.
• Removed the tff.framework.ComputationBuildingBlock.is_foo methods.
• Renamed tff.learning.algorithms.build_personalization_eval to
  tff.learning.algorithms.build_personalization_eval_computation
• tff.learning.models.ReconstructionModel.from_keras_model will now check
  that global and local variables are disjoint, raise ValueError if they are
  not.

Bug Fixes

• Fixed tff.learning.models.ReconstructionModel.has_only_global_variables
  (it was returning incorrect value).