Create card for BERT-Tiny fine-tuned on SQuAD v2
Author: mrm8488
Pull request: yes
Labels: name: model card

- Only 17MB of Model weights!!
- The smalles model fine-tuned on SQUaD v2?

Comments:
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/3347?src=pr&el=h1) Report
> Merging [#3347](https://codecov.io/gh/huggingface/transformers/pull/3347?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/cec3cdda1599541b033e07a9838386189a5d0010&el=desc) will **increase** coverage by `1.15%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/3347/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/3347?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #3347      +/-   ##
==========================================
+ Coverage   76.46%   77.61%   +1.15%     
==========================================
  Files         100      100              
  Lines       16948    16948              
==========================================
+ Hits        12960    13155     +195     
+ Misses       3988     3793     -195     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/3347?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/modeling\_openai.py](https://codecov.io/gh/huggingface/transformers/pull/3347/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ19vcGVuYWkucHk=) | `81.54% <0.00%> (+1.34%)` | :arrow_up: |
| [src/transformers/modeling\_xlnet.py](https://codecov.io/gh/huggingface/transformers/pull/3347/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ194bG5ldC5weQ==) | `75.77% <0.00%> (+2.29%)` | :arrow_up: |
| [src/transformers/modeling\_ctrl.py](https://codecov.io/gh/huggingface/transformers/pull/3347/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ19jdHJsLnB5) | `98.24% <0.00%> (+2.63%)` | :arrow_up: |
| [src/transformers/modeling\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/3347/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl91dGlscy5weQ==) | `87.65% <0.00%> (+5.18%)` | :arrow_up: |
| [src/transformers/modeling\_roberta.py](https://codecov.io/gh/huggingface/transformers/pull/3347/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ19yb2JlcnRhLnB5) | `95.71% <0.00%> (+10.00%)` | :arrow_up: |
| [src/transformers/modeling\_tf\_pytorch\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/3347/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl9weXRvcmNoX3V0aWxzLnB5) | `89.93% <0.00%> (+81.20%)` | :arrow_up: |

------

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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/3347?src=pr&el=footer). Last update [cec3cdd...ed378f0](https://codecov.io/gh/huggingface/transformers/pull/3347?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).