Release v2.22.0

[khaeru]

PR checklist

• Checks all ✅
• Update documentation N/A
• Update doc/whatsnew.rst

[khaeru]

CI failures here occur because the ECB service is offline for maintenance. cf. #148.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.09%. Comparing base (55c45fb) to head (29ab95b).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #229      +/-   ##
==========================================
- Coverage   98.92%   98.09%   -0.84%     
==========================================
  Files         103      103              
  Lines        8667     8669       +2     
==========================================
- Hits         8574     8504      -70     
- Misses         93      165      +72     

Files with missing lines	Coverage Δ
sdmx/tests/test_client.py	100.00% <100.00%> (ø)

... and 20 files with indirect coverage changes

🚀 New features to boost your workflow:

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