CompatHelper: bump compat for "StatsBase" to "0.33"

[github-actions]

This pull request changes the compat entry for the StatsBase package from 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32 to 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33.

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 #142 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #142   +/-   ##
=======================================
  Coverage   55.32%   55.32%           
=======================================
  Files          28       28           
  Lines        1240     1240           
=======================================
  Hits          686      686           
  Misses        554      554           

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