Update requirements-dev.txt
- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

This file is auto-generated from our other dependency file. Why did you
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On Mon, Jun 17, 2019 at 2:01 PM HARSHIT JAIN <notifications@github.com>
wrote:

>
>    - closes #xxxx
>    - tests added / passed
>    - passes git diff upstream/master -u -- "*.py" | flake8 --diff
>    - whatsnew entry
>
> ------------------------------
> You can view, comment on, or merge this pull request online at:
>
>   https://github.com/pandas-dev/pandas/pull/26909
> Commit Summary
>
>    - Update requirements-dev.txt
>
> File Changes
>
>    - *M* requirements-dev.txt
>    <https://github.com/pandas-dev/pandas/pull/26909/files#diff-0> (3)
>
> Patch Links:
>
>    - https://github.com/pandas-dev/pandas/pull/26909.patch
>    - https://github.com/pandas-dev/pandas/pull/26909.diff
>
> —
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>
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=h1) Report
> Merging [#26909](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/baa77c33fb71c29acea21ba06adaf426ed4cb561?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/26909/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #26909      +/-   ##
==========================================
- Coverage   91.87%   91.86%   -0.01%     
==========================================
  Files         180      180              
  Lines       50712    50712              
==========================================
- Hits        46590    46586       -4     
- Misses       4122     4126       +4
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.45% <ø> (ø)` | :arrow_up: |
| #single | `41.09% <ø> (-0.09%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/26909/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `88.88% <0%> (-11.12%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/26909/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `96.88% <0%> (-0.12%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26909?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/pandas-dev/pandas/pull/26909?src=pr&el=footer). Last update [baa77c3...f72d0e9](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=h1) Report
> Merging [#26909](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/baa77c33fb71c29acea21ba06adaf426ed4cb561?src=pr&el=desc) will **decrease** coverage by `<.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/26909/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #26909      +/-   ##
==========================================
- Coverage   91.87%   91.86%   -0.01%     
==========================================
  Files         180      180              
  Lines       50712    50712              
==========================================
- Hits        46590    46586       -4     
- Misses       4122     4126       +4
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `90.45% <ø> (ø)` | :arrow_up: |
| #single | `41.09% <ø> (-0.09%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/26909/diff?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `88.88% <0%> (-11.12%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/26909/diff?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `96.88% <0%> (-0.12%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/26909?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/pandas-dev/pandas/pull/26909?src=pr&el=footer). Last update [baa77c3...f72d0e9](https://codecov.io/gh/pandas-dev/pandas/pull/26909?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 closing, not sure what the purpose of this PR is.