Update tqdm to 4.29.1

[pyup-bot]

This PR updates tqdm from 4.28.1 to 4.29.1.

Changelog

4.29.1

- fix `classmethod` lock bug (617: 457 -> 658)
- add unit test to prevent regression

4.29.0

- Avoid global multiprocessing locks (611 -> 617)
- Add support for infinite iterables (651)
- Fix missing attr pos when used in multi-threaded environment (573)
- Do not join `TMonitor` if it is the current thread (613 -> 641)
- Add OpenBSD NIX support (638)
- Unit tests, general documentation fixes and tidying (e.g. 642)
- CI travis improvements
+ `py37-dev` -> `py37` (622)
+ fix `py26`

Links

• PyPI: https://pypi.org/project/tqdm
• Changelog: https://pyup.io/changelogs/tqdm/
• Repo: https://github.com/tqdm/tqdm

[coveralls]

Pull Request Test Coverage Report for Build 568

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 56.65%

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Totals
Change from base Build 565:	0.0%
Covered Lines:	4758
Relevant Lines:	8399

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💛 - Coveralls

[pyup-bot]

Closing this in favor of #139