Set of hyperparameters.

def transformer_base_v2():
  """Set of hyperparameters."""
  hparams = transformer_base_v1()
  hparams.layer_preprocess_sequence = "n"
  hparams.layer_postprocess_sequence = "da"
  hparams.layer_prepostprocess_dropout = 0.1
  hparams.attention_dropout = 0.1
  hparams.relu_dropout = 0.1
  hparams.learning_rate_warmup_steps = 8000
  hparams.learning_rate = 0.2
  return hparams