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 0.33 to 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

Patch coverage has no change and project coverage change: -0.19% :warning:

Comparison is base (7e0cc2f) 59.73% compared to head (7183e80) 59.55%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #225 +/- ## ========================================== - Coverage 59.73% 59.55% -0.19% ========================================== Files 16 16 Lines 996 994 -2 ========================================== - Hits 595 592 -3 - Misses 401 402 +1 ``` [see 2 files with indirect coverage changes](https://app.codecov.io/gh/YichengDWu/Sophon.jl/pull/225/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yicheng+Wu)

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