Use preorder to post-order

[ms609]

Will mean removing sizeSort and renumber parameters

Check reverse dependencies:

• TreeSearch
• TreeDist
• Rogue
• Quartet

Will complete #49

[codecov]

Codecov Report

Merging #109 (8ac20ca) into master (1c9072b) will increase coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head 8ac20ca differs from pull request most recent head 857b70e. Consider uploading reports for the commit 857b70e to get more accurate results

@@            Coverage Diff             @@
##           master     #109      +/-   ##
==========================================
+ Coverage   97.04%   97.05%   +0.01%     
==========================================
  Files          45       45              
  Lines        3751     3703      -48     
==========================================
- Hits         3640     3594      -46     
+ Misses        111      109       -2     

Impacted Files	Coverage Δ
src/TreeTools-init.c	100.00% <ø> (ø)
R/RcppExports-manual.R	60.00% <100.00%> (ø)
R/Splits.R	98.71% <100.00%> (+0.05%)	⬆️
R/TreeNumber.R	99.27% <100.00%> (ø)
R/phylo.R	99.39% <100.00%> (ø)
R/tree_display.R	100.00% <100.00%> (ø)
R/tree_generation.R	100.00% <100.00%> (ø)
R/tree_numbering.R	100.00% <100.00%> (ø)
R/tree_rearrangement.R	98.22% <100.00%> (+<0.01%)	⬆️
R/tree_shape.R	100.00% <100.00%> (ø)
... and 6 more

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