Tokenizer 1.25.0

New features

• Add training flag in tokenization methods to disable subword regularization during inference
• [Python] Implement __len__ method in the Token class

Fixes and improvements

• Raise an error when enabling case_markup with incompatible tokenization modes "space" and "none"
• [Python] Improve parallelization when Tokenizer.tokenize is called from multiple Python threads (the Python GIL is now released)
• [Python] Cleanup some manual Python <-> C++ types conversion