chore: Bump METATYPE_VERSION to 0.4.3

[destifo]

• Release the next version with patches.

Migration notes

• The change comes with new or modified tests
• Hard-to-understand functions have explanatory comments
• End-user documentation is updated to reflect the change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.40%. Comparing base (fc6a7bc) to head (c4db8b2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #764   +/-   ##
=======================================
  Coverage   73.40%   73.40%           
=======================================
  Files         115      115           
  Lines       14027    14027           
  Branches     1416     1416           
=======================================
  Hits        10297    10297           
  Misses       3704     3704           
  Partials       26       26           

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