Update versions in pom.xml and documentation after 0.4.1 release

[github-actions]

• Versions are updated in pom.xml, README.md and in examples
• Current project version is incremented to the next snapshot

[codecov]

Codecov Report

Merging #777 (e4829a1) into master (505b024) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #777   +/-   ##
=========================================
  Coverage     80.53%   80.53%           
  Complexity     2044     2044           
=========================================
  Files            97       97           
  Lines          5298     5298           
  Branches       1638     1638           
=========================================
  Hits           4267     4267           
  Misses          247      247           
  Partials        784      784           

Flag	Coverage Δ	Complexity Δ
unittests	80.53% <ø> (ø)	0.00 <ø> (ø)

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