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

[github-actions[bot]]

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[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (f83f0c7) 87.60% compared to head (d6968ff) 87.60%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #301 +/- ## ======================================= Coverage 87.60% 87.60% ======================================= Files 15 15 Lines 1759 1759 ======================================= Hits 1541 1541 Misses 218 218 ```

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