BUG: pass *args and **kwargs for wrapped methods in Groupby (#14107)
- [x] closes #14107 
- [ ] tests added / passed
- [ ] passes `git diff upstream/master | flake8 --diff`
- [ ] whatsnew entry

Methods such as 'hist' that take keyword arguments would now be able to be called via a Groupby object and the keyword args would be passed onwards to matplotlib as the user expects.

tests!
 ## [Current coverage](https://codecov.io/gh/pydata/pandas/pull/14109?src=pr) is 85.24% (diff: 0.00%)

> Merging [#14109](https://codecov.io/gh/pydata/pandas/pull/14109?src=pr) into [master](https://codecov.io/gh/pydata/pandas/branch/master?src=pr) will decrease coverage by **0.02%**

``` diff
@@             master     #14109   diff @@
==========================================
  Files           139        140     +1   
  Lines         50502      50556    +54   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits          43063      43094    +31   
- Misses         7439       7462    +23   
  Partials          0          0          
```

> Powered by [Codecov](https://codecov.io?src=pr). Last update [a0151a7...429509e](https://codecov.io/gh/pydata/pandas/compare/a0151a7b1287e77bcaf0340eba51a2efd7fa8bba...429509e3ccd80ee6c684e83cf4f50ee15630bfba?src=pr)
 pls add tests
 BTW, I just removed a duplicate dictionary entry on `test_tslib.py`.
It was there for a year now and I have no idea how anything was able to pass lint until now.
 I'll need some help at this point (@jreback or others available). My change was a simple one-liner, and I added a test that fails without my change and succeeds with it; so I'm pretty certain my change is fully covered.
However codecov/patch says 0.00%. I'm not sure what it means and how to fix it. Help?
 Pinging again. I'd really love to contribute this tiny piece, but if it is just remaining as clutter, I'll remove the PR to avoid future confusion.
 I think your example fails in current master. can you clarify? @yonatanp I am still unclear what the exact issue is here, can you show an example? can you rebase can you rebase / update closing as stale