Bump version from 2.8.3 to 2.9.0

[andreasnoack]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.50%. Comparing base (10e4883) to head (8b91d9c).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #544   +/-   ##
=======================================
  Coverage   94.50%   94.50%           
=======================================
  Files          14       14           
  Lines        3023     3023           
=======================================
  Hits         2857     2857           
  Misses        166      166           

Flag	Coverage Δ
unittests	94.50% <ø> (ø)

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