Node v0.8.0

BREACKING CHANGES

• Many improvements on the Trainer (#519).
  The files must now be provided first when calling tokenizer.train(files, trainer).

Features

• Adding the TemplateProcessing
• Add WordLevel and Unigram models (#490)
• Add nmtNormalizer and precompiledNormalizer normalizers (#490)
• Add templateProcessing post-processor (#490)
• Add digitsPreTokenizer pre-tokenizer (#490)
• Add support for mapping to sequences (#506)
• Add splitPreTokenizer pre-tokenizer (#542)
• Add behavior option to the punctuationPreTokenizer (#657)
• Add the ability to load tokenizers from the Hugging Face Hub using fromPretrained (#780)

Fixes

• Fix a bug where long tokenizer.json files would be incorrectly deserialized (#459)
• Fix RobertaProcessing deserialization in PostProcessorWrapper (#464)