Update versions in pom.xml and documentation after 1.2.2 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 #1483 (1fcd5f5) into master (e38af67) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1483   +/-   ##
=========================================
  Coverage     82.96%   82.96%           
  Complexity     2579     2579           
=========================================
  Files           111      111           
  Lines          7708     7708           
  Branches       2111     2111           
=========================================
  Hits           6395     6395           
  Misses          418      418           
  Partials        895      895           

Flag	Coverage Δ
unittests	82.96% <ø> (ø)

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