use new generic zeros from MatrixPencils

[baggepinnen]

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[JuliaControlBot]

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Plots were compared to references. 3/11 images have changed, see differences below.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.42%. Comparing base (7266a8c) to head (e2d204c).
Report is 21 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1004      +/-   ##
==========================================
- Coverage   92.52%   92.42%   -0.10%     
==========================================
  Files          41       41              
  Lines        5096     5124      +28     
==========================================
+ Hits         4715     4736      +21     
- Misses        381      388       +7     

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