chore: bumped version to 0.20.1.dev0, fixed black in pyproject.toml

[bigcat88]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.13%. Comparing base (ebce575) to head (7f91bbd).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #359   +/-   ##
=======================================
  Coverage   95.13%   95.13%           
=======================================
  Files          45       45           
  Lines        5325     5325           
=======================================
  Hits         5066     5066           
  Misses        259      259           

Files with missing lines	Coverage Δ
nc_py_api/_version.py	100.00% <100.00%> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.