Update README.md
- Show that the last uploaded version was trained on more data (custom_license files)
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/3552?src=pr&el=h1) Report
> Merging [#3552](https://codecov.io/gh/huggingface/transformers/pull/3552?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/83d1fbcff608f84a27234e20d6531b4404dc059e&el=desc) will **decrease** coverage by `0.49%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/3552/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/3552?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #3552      +/-   ##
==========================================
- Coverage   78.31%   77.81%   -0.50%     
==========================================
  Files         100      100              
  Lines       17064    17064              
==========================================
- Hits        13363    13278      -85     
- Misses       3701     3786      +85     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/3552?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/data/processors/squad.py](https://codecov.io/gh/huggingface/transformers/pull/3552/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9kYXRhL3Byb2Nlc3NvcnMvc3F1YWQucHk=) | `28.89% <0.00%> (-27.60%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/3552?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/3552?src=pr&el=footer). Last update [83d1fbc...cd4f658](https://codecov.io/gh/huggingface/transformers/pull/3552?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
