Bump tqdm from 4.50.0 to 4.50.2

[dependabot-preview[bot]]

Bumps tqdm from 4.50.0 to 4.50.2.

Release notes

Sourced from tqdm's releases.

tqdm v4.50.2 stable

• fixed platform.system() causing fork() warnings (#691)
• fixed contrib.concurrent.process_map pickling error with threading.RLock (#920)
• updated documentation & examples
• updated CI framework
• updated tests
• misc code tidy

tqdm v4.50.1 stable

• fix multiprocessing lock creation leak (#982, #936, #759)
  • fixes #617 which introduced this bug (v4.29.0, released 2019-01-06, undiagnosed until now) where multiple threads could concurrently create and append process locks to a global list, then try to release them without first acquiring :imp:
• major test overhaul: fix, update, and speed up
• misc CI framework updates
• code linting
• minor documentation tidy

Commits

• 8f9e03d bump version, merge branch 'devel'
• ab32d02 test: perf: tighten crucial important tests, add to pre-commit
• 4db32a3 tests: fix timing decorator logic, CI: update pypy version
• 711c270 misc tidy
• 1b0f498 tests: group checks, try perf harder
• cad8078 contrib.concurrent: save & restore lock state
• 6e5b1b8 update multiprocessing docs & examples
• 1209c89 minor doc formatting fix
• 572a8e8 contrib.concurrent.process_map: fix threading.RLock pickling error
• a00f7f3 utils:OS detection using sys.platform
• Additional commits viewable in compare view

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[dependabot-preview[bot]]

Superseded by #70.