updates submodules and travis fix; updates contributions

[danielpeter]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.47%. Comparing base (056d6a8) to head (17f3bca).
Report is 28 commits behind head on devel.

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #1764      +/-   ##
==========================================
- Coverage   50.50%   50.47%   -0.04%     
==========================================
  Files         271      271              
  Lines       61812    61845      +33     
==========================================
- Hits        31221    31216       -5     
- Misses      30591    30629      +38     

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