CompatHelper: bump compat for Turing to 0.22 for package ppl, (keep existing compat)

[github-actions[bot]]

This pull request changes the compat entry for the Turing package from 0.16, 0.17, 0.18, 0.19, 0.20, 0.21 to 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22 for package ppl. 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

Base: 97.63% // Head: 97.63% // No change to project coverage :thumbsup:

Coverage data is based on head (8000614) compared to base (785dc8b). Patch has no changes to coverable lines.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #341 +/- ## ======================================= Coverage 97.63% 97.63% ======================================= Files 10 10 Lines 380 380 ======================================= Hits 371 371 Misses 9 9 ``` Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaGaussianProcesses). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaGaussianProcesses)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.