Add sysmpy in requirment (#824)

* add replication pad

* update op_list.md

* re-lint

* fixed aten::index

* rm useless code

* Support Wav2vec2

* Support onnx roberta

* update op_list.md

* deal with comments

* deal with comments

* Support T5

* fixed for ci

* deal with comments

* deal with scalar tensor

* fixed misspell

* Add doc for HuggingFace

* rm useless info

* fixed bug

* add sysmpy in requirements.txt

requirements.txt

+sympy