Dynamic Quantization on BERT notebook - huggingface transformer version

[lambdaofgod]

🐛 Bug

The notebook for Dynamic Quantization on BERT should use fixed version of huggingface/transformers, I've tried and it works with transformers==2.0.0

Withouth this change it gives error in section 3.2:

TypeError: glue_convert_examples_to_features() got an unexpected keyword argument 'pad_on_left'

[TheMemoryDealer]

/assigntome