message: Pin numpy version to 1.19
diff: @@ -58,7 +58,7 @@ REQUIRED_PACKAGES = [
  'google_pasta >= 0.1.6',
  'keras_applications >= 1.0.8',
  'keras_preprocessing == 1.1.0',
  - 'numpy >= 1.16.0, < 2.0',
  + 'numpy >= 1.16.0, < 1.19.0',
  'opt_einsum >= 2.3.2',
  'protobuf >= 3.8.0',
  'tensorboard >= 2.1.0, < 2.2.0',
  