There is a small typo in bypy/bypy.py.

Should read `requirement` rather than `requirment`.

Fix typo

修改ByPy的__proceed_remote_gather函数，修复重复上传已存在文件的问题 (#530)

Co-authored-by: Nxiyoufang <xiyoufang@yeah.net>

- Fix the bug that clean up code not called on exit
- Version bump

- Cause: Baidu will give error {'error_code': 31061, 'error_msg': 'file already exists'} for multiprocess upload as the intermediate directories are being created almost simultaneously.
- Fix: Retry on error 31061 (previously, we don't retry)