Upgrade the version to 1.2.0-SNAPSHOT

[halspang]

Description

Upgrade the version to 1.2.0-SNAPSHOT

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR will close: endgame

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Extended the documentation

[codecov]

Codecov Report

Merging #549 (af7d6ce) into master (27ce598) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #549   +/-   ##
=========================================
  Coverage     80.52%   80.52%           
  Complexity      981      981           
=========================================
  Files            88       88           
  Lines          3024     3024           
  Branches        331      331           
=========================================
  Hits           2435     2435           
  Misses          423      423           
  Partials        166      166           

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