v4.6.0

Added

• Support for community datasets on GCS.
• [API] tfds.builder_from_directory and tfds.builder_from_directories, see
  https://www.tensorflow.org/datasets/external_tfrecord#directly_from_folder.
• [API] Dash ("-") support in split names.
• [API] file_format argument to download_and_prepare method, allowing user
  to specify an alternative file format to store prepared data (e.g. "riegeli").
• [API] file_format to DatasetInfo string representation.
• [API] Expose the return value of Beam pipelines. This allows for users to
  read the Beam metrics.
• [API] Expose Feature tf_example_spec to public.
• [API] doc kwarg on Features, to describe a feature.
• [Documentation] Features description is shown on TFDS Catalog.
• [Documentation] More metadata about HuggingFace datasets in TFDS catalog.
• [Performance] Parallel load of metadata files.
• [Testing] TFDS tests are now run using GitHub actions - misc improvements such
  as caching and sharding.
• [Testing] Improvements to MockFs.
• New datasets.

Changed

• [API] num_shards is now optional in the shard name.

Removed

• TFDS pathlib API, migrated to a self-contained etils.epath (see
  https://github.com/google/etils).

Fixed

• Various datasets.
• Dataset builders that are defined adhoc (e.g. in Colab).
• Better DatasetNotFoundError messages.
• Don't set deterministic on a global level but locally in interleave, so it
  only apply to interleave and not all transformations.
• Google drive downloader.

As always, thank you to all contributors!