BUG: Fix using dtype with parse_dates in read_csv
- [x] closes #34066
- [x] tests added/passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Comments from @jreback and @dsaxton notwithstanding, the changes look good ! @mproszewska Are you still interested in working on this? If so can you merge master? Closing as stale, @mproszewska let us know if you'd like to reopen I can go back to working on this. Could you reopen? @mproszewska : Done Hello @mproszewska! Thanks for updating this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:







There are currently no PEP 8 issues detected in this Pull Request. Cheers! :beers: 

##### Comment last updated at 2020-10-08 20:36:43 UTC seems not unreasonable, but his PR is stale.