feat: enable janet on pesto

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (a4e80a6) 81.46% compared to head (38ca708) 81.46%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #218 +/- ## ======================================= Coverage 81.46% 81.46% ======================================= Files 26 26 Lines 1597 1597 ======================================= Hits 1301 1301 Misses 296 296 ```

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