add JET analysis

[baggepinnen]

to check for dynamic dispatch. Also improve allocation performance to allow for completely allocation free operation of KF and UKF

[codecov]

Codecov Report

Attention: Patch coverage is 96.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 87.71%. Comparing base (ff3559d) to head (ad2b402).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
src/filtering.jl	87.50%	1 Missing ⚠️
src/kalman.jl	94.11%	1 Missing ⚠️
src/ukf.jl	97.87%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #141      +/-   ##
==========================================
+ Coverage   87.24%   87.71%   +0.46%     
==========================================
  Files          15       15              
  Lines        1176     1237      +61     
==========================================
+ Hits         1026     1085      +59     
- Misses        150      152       +2     

Flag	Coverage Δ
unittests	87.71% <96.00%> (+0.46%)	⬆️

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