prepare release v1.13.4

[nkysg]

Pull request type

prepare release v1.13.4

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Other information

[codecov]

Codecov Report

Merging #3888 (1867d7d) into master (46f2537) will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3888      +/-   ##
==========================================
- Coverage   53.74%   53.67%   -0.07%     
==========================================
  Files         616      616              
  Lines       67843    67843              
==========================================
- Hits        36457    36408      -49     
- Misses      31386    31435      +49     

Flag	Coverage Δ
unittests	53.67% <ø> (-0.07%)	⬇️

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see 12 files with indirect coverage changes

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