CompatHelper: bump compat for StatsBase to 0.34, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the StatsBase package from 0.32, 0.33 to 0.32, 0.33, 0.34.
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

Patch and project coverage have no change.

Comparison is base (ef6d459) 94.16% compared to head (dbbe3e9) 94.16%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #502   +/-   ##
=======================================
  Coverage   94.16%   94.16%           
=======================================
  Files          52       52           
  Lines        1387     1389    +2     
=======================================
+ Hits         1306     1308    +2     
  Misses         81       81           

see 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[devmotion]

The "Transform" test failures on Julia >= 1.9 are known and unrelated (probably due to some allocation changes in LinearAlgebra?).