Log Transforms

[AlexRobson]

Adds two forms of log transforms.

Either:

• LogTransform: sign(x) * log(|x| + 1)
• InverseHyperbolicSine: log(x + √(x² + 1)).

[codecov]

Codecov Report

Merging #104 (bc8b0ff) into main (d220481) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #104      +/-   ##
==========================================
+ Coverage   98.63%   98.70%   +0.07%     
==========================================
  Files          12       13       +1     
  Lines         147      155       +8     
==========================================
+ Hits          145      153       +8     
  Misses          2        2              

Impacted Files	Coverage Δ
src/FeatureTransforms.jl	100.00% <ø> (ø)
src/log.jl	100.00% <100.00%> (ø)
src/apply.jl	100.00% <0.00%> (ø)
src/periodic.jl	100.00% <0.00%> (ø)
src/one_hot_encoding.jl	100.00% <0.00%> (ø)

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[mzgubic]

Nice, thanks!