TensorFlow Federated 0.46.0

Release 0.46.0

Major Features and Improvements

• Added parameter and implementation for C++ remote executor to stream the
  values in a structure across the gRPC interface.
• Added tff.backends.native.desugar_and_transform_to_native to the public
  API.
• Replaced GroupNorm implementation with implementation from Keras.
• Added tff.simulations.datasets.flair APIs for the FLAIR dataset.

Breaking Changes

• Removed file extension for model_output_manager used in
  tff.learning.programs

Bug Fixes

• Enabled and fixed python type annotations in some modules.
• Changed tff.learning.algorithms.build_weighted_fed_prox parameter
  validation to allow proximal_strength = 0.0, matching the pydoc.