Add ZM set/drop trans

[paleolimbot]

No description provided.

[codecov-commenter]

Codecov Report

Merging #89 (f9d3bc6) into master (fbeeb2f) will increase coverage by 0.14%.
The diff coverage is 98.59%.

@@            Coverage Diff             @@
##           master      #89      +/-   ##
==========================================
+ Coverage   98.26%   98.41%   +0.14%     
==========================================
  Files          67       69       +2     
  Lines        4727     4782      +55     
==========================================
+ Hits         4645     4706      +61     
+ Misses         82       76       -6     

Impacted Files	Coverage Δ
src/trans-affine.c	100.00% <ø> (ø)
src/handle-wkt.cpp	98.59% <87.50%> (+<0.01%)	⬆️
R/set.R	100.00% <100.00%> (ø)
inst/include/wk-v1-impl.c	93.06% <100.00%> (+0.06%)	⬆️
src/trans-set.c	100.00% <100.00%> (ø)
src/transform.c	99.24% <100.00%> (+5.08%)	⬆️

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