Updates for CRAN

[KonstiDE]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 5.63380% with 67 lines in your changes missing coverage. Please review.

Project coverage is 76.10%. Comparing base (a69643a) to head (0868641).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
src/spectralIndices.cpp	5.63%	67 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #119      +/-   ##
==========================================
+ Coverage   69.07%   76.10%   +7.03%     
==========================================
  Files          53       52       -1     
  Lines        2878     2616     -262     
==========================================
+ Hits         1988     1991       +3     
+ Misses        890      625     -265     

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