CompatHelper: bump compat for CSV to 0.9, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the CSV package from 0.4, 0.5, 0.6, 0.7, 0.8 to 0.4, 0.5, 0.6, 0.7, 0.8, 0.9.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

Merging #164 (50eea69) into master (3806227) will not change coverage.
The diff coverage is 71.42%.

@@           Coverage Diff           @@
##           master     #164   +/-   ##
=======================================
  Coverage   86.27%   86.27%           
=======================================
  Files          29       29           
  Lines       11736    11736           
=======================================
  Hits        10125    10125           
  Misses       1611     1611           

Impacted Files	Coverage Δ
src/pairwiseDistanceLS.jl	96.63% <ø> (ø)
src/readData.jl	63.48% <50.00%> (ø)
src/moves_semidirected.jl	98.35% <100.00%> (ø)
src/nj.jl	92.40% <100.00%> (ø)
src/pseudolik.jl	82.16% <0.00%> (-0.12%)	⬇️
src/readwrite.jl	78.99% <0.00%> (+0.13%)	⬆️

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