LayerNorm eps value

Hi!

thanks for this little piece of juicy code!

Just for curiosity, I've noticed that in your implementation you are using `nn.LayerNorm` with the standard denominator constant `eps=1e-5`, whereas in other implementations (`DINO` [[here](https://github.com/facebookresearch/dino/blob/main/vision_transformer.py)] and `ViT` in `timm`[[here](https://github.com/rwightman/pytorch-image-models/blob/master/timm/models/vision_transformer.py)]) this parameter is explicitly set to `eps=1e-6`.

I know that it is a small detail, but details sometimes are super-important for having better models.

Do you think the model is sensitive to this kind of parameter change? Have you ever tried/noticed it?

Thanks!