Urchade Zaratiana

Results 2 issues of Urchade Zaratiana

end_class is not used for the Autoregressive module: https://github.com/harvardnlp/pytorch-struct/blob/7146de5659ff17ad7be53023c025ffd099866412/torch_struct/autoregressive.py#L49

HI, First, thank you for fixing #110 (@da03), the SemiCRF works better now, I was able to get good results on span extraction tasks. However, I still encounter a learning...