Update version to 0.4.3 pre-emptively

[jackgerrits]

• Clean up old versions from switcher too

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.38%. Comparing base (46ea0ad) to head (089598e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5066      +/-   ##
==========================================
- Coverage   69.41%   69.38%   -0.03%     
==========================================
  Files         163      163              
  Lines       10494    10494              
==========================================
- Hits         7284     7281       -3     
- Misses       3210     3213       +3     

Flag	Coverage Δ
unittests	69.38% <ø> (-0.03%)	⬇️

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