I want to contribute by adding wavaugment

[jiamingkong]

Hi, thank you for this amazing library, it's so much easier to use than compiling my own dataset script and adapting to huggingface's provided script.

I want to contribute to this git by adding the WavAugment functionalities into finetuning process to enhance the finetuning models. To my knowledge WavAugment works amazingly with wav2vec2 based models.

Are you working on this feature? If not I would love to send a PR.