DOC: Add missing parameters to Series constructor
Added documentation to pandas.Series for "name" and "fastpath" parameters.
Hello @SHuangISU! Thanks for opening this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

* In the file [`pandas/core/series.py`](https://github.com/pandas-dev/pandas/blob/fbe63af20be0fc0ccb95c88231bdc4177a739843/pandas/core/series.py):

> [Line 174:82](https://github.com/pandas-dev/pandas/blob/fbe63af20be0fc0ccb95c88231bdc4177a739843/pandas/core/series.py#L174): [W291](https://duckduckgo.com/?q=pep8%20W291) trailing whitespace
> [Line 175:56](https://github.com/pandas-dev/pandas/blob/fbe63af20be0fc0ccb95c88231bdc4177a739843/pandas/core/series.py#L175): [W291](https://duckduckgo.com/?q=pep8%20W291) trailing whitespace
> [Line 176:1](https://github.com/pandas-dev/pandas/blob/fbe63af20be0fc0ccb95c88231bdc4177a739843/pandas/core/series.py#L176): [W293](https://duckduckgo.com/?q=pep8%20W293) blank line contains whitespace
> [Line 179:1](https://github.com/pandas-dev/pandas/blob/fbe63af20be0fc0ccb95c88231bdc4177a739843/pandas/core/series.py#L179): [W293](https://duckduckgo.com/?q=pep8%20W293) blank line contains whitespace
> [Line 180:33](https://github.com/pandas-dev/pandas/blob/fbe63af20be0fc0ccb95c88231bdc4177a739843/pandas/core/series.py#L180): [W291](https://duckduckgo.com/?q=pep8%20W291) trailing whitespace

 1. You should install this tool on your machine: https://github.com/tj/git-extras
2. Then make the five changes as instructed by the pep8speaks comment above
3. Use `git squash HEAD~1` to undo the last commit: https://github.com/tj/git-extras/blob/master/Commands.md#git-squash
4. Do `git commit -am "DOC: add API docstrings to pandas.Series for 'name' and 'fastpath'"` as per the guidelines: https://pandas.pydata.org/pandas-docs/stable/development/contributing.html#committing-your-code
5. To override your first commit you'll have to do `git push -f` that should automatically updat e this PR for what its worth, when merging a PR we squash all commits into one, so its really only step 2 that is needed @SHuangISU can you address the review comments please? We've got another PR adding these parameters to this doc, if you're not planning to finish this PR, please let me know, so I'll keep the other one open. Thanks! @datapythonista - I'd say you could give @SHuangISU 24hrs to respond and if he doesn't get to it you can close this and perhaps point out a similar issue that's available Thanks for the suggestion @sbrice, but contributors to pandas are volunteers working in their scarce free time, and giving 24h to respond sounds unreasonable and rude to me. Yeah, the suggestion was within the context of our event i wasn't sure who the other PR was coming from Ah, that makes sense, didn't get that. Thanks! I think the other PR referenced is #27964 which was updated more recently. I think that one is pretty close so to keep things simple let's close this one out

@SHuangISU certainly would accept any other contributions you'd like to offer