CompatHelper: bump compat for StatsFuns to 1, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the StatsFuns package from 0.9 to 0.9, 1.
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.

[coveralls]

Pull Request Test Coverage Report for Build 2248370872

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 64.892%

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Totals
Change from base Build 2061061199:	0.2%
Covered Lines:	329
Relevant Lines:	507

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💛 - Coveralls

[codecov]

Codecov Report

Merging #51 (025228e) into master (f0baacd) will increase coverage by 0.19%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #51      +/-   ##
==========================================
+ Coverage   64.69%   64.89%   +0.19%     
==========================================
  Files           7        7              
  Lines         507      507              
==========================================
+ Hits          328      329       +1     
+ Misses        179      178       -1     

Impacted Files	Coverage Δ
src/model.jl	94.59% <0.00%> (+2.70%)	⬆️

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