message: Upper bound `numpy` dependency to `1.19.0`.
  Since `numpy==1.19.0` contains at least one breaking ABI change (numpy/numpy#15355), we need to either upper bound the dependency's range or fix our code to support both ABIs. Since the second requires more changes, we prefer the first one for now.
diff: @@ -58,7 +58,9 @@ REQUIRED_PACKAGES = [
  'google_pasta >= 0.1.8',
  'h5py >= 2.10.0, < 2.11.0',
  'keras_preprocessing >= 1.1.1, < 1.2',
  - 'numpy >= 1.16.0, < 2.0',
  + # TODO(mihaimaruseac): numpy 1.19.0 has ABI breakage
  + # https://github.com/numpy/numpy/pull/15355
  + 'numpy >= 1.16.0, < 1.19.0',
  'opt_einsum >= 2.3.2',
  'protobuf >= 3.9.2',
  'tensorboard >= 2.2.0, < 2.3.0',
  