Update setup.py
changed update setup file
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/1610?src=pr&el=h1) Report
> Merging [#1610](https://codecov.io/gh/huggingface/transformers/pull/1610?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/ef1b8b2ae5ad1057154a126879f7eb8de685f862?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/1610/graphs/tree.svg?width=650&token=9qOlN6Hb1c&height=150&src=pr)](https://codecov.io/gh/huggingface/transformers/pull/1610?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master    #1610   +/-   ##
=======================================
  Coverage   86.17%   86.17%           
=======================================
  Files          91       91           
  Lines       13595    13595           
=======================================
  Hits        11715    11715           
  Misses       1880     1880
```



------

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<|||||>Why should we change this?