Fix emotion description
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Hello, I probably have a silly question but the labels of the emotion dataset are in the form of numbers and not string, so I can not use the function classification_report because it mixes numbers and string (prediction). How can I access the label in the form of a string and not a number? 
Thank you in advance.
2021-04-22T14:47:31Z
https://github.com/huggingface/datasets/pull/745#issuecomment-824907744
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2021-04-22T14:47:31Z
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Fixes the description of the emotion dataset to reflect the class names observed in the data, not the ones described in the paper.

I also took the liberty to make use of `ClassLabel` for the emotion labels.