Update xs2a to version 2.1

[wandi34]

Summary

(What is this feature about)

Checklist for Definition of Done

Depending on the task some of the following jobs are not relevant. Please check the items or cross them out (~~text~~).

• [x] Code is technically reviewed by myself
• [x] Code is manually tested
• [x] Automatic tests for new functionality are created
• [x] Documentation is updated
• [x] Git history is clean

[codecov[bot]]

Codecov Report

Merging #90 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #90   +/-   ##
=========================================
  Coverage     71.56%   71.56%           
  Complexity      267      267           
=========================================
  Files            75       75           
  Lines          1544     1544           
  Branches         99       99           
=========================================
  Hits           1105     1105           
  Misses          381      381           
  Partials         58       58

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