Adjust jest config to address warnings

[codecov-commenter]

Codecov Report

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

Project coverage is 98.81%. Comparing base (e23db83) to head (3d28c9a). Report is 11 commits behind head on main.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #468 +/- ## ======================================= Coverage 98.81% 98.81% ======================================= Files 19 19 Lines 1606 1608 +2 Branches 439 440 +1 ======================================= + Hits 1587 1589 +2 Misses 18 18 Partials 1 1 ``` | [Flag](https://app.codecov.io/gh/julianna-langston/chart2music/pull/468/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/julianna-langston/chart2music/pull/468/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `98.81% <ø> (+<0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None#carryforward-flags-in-the-pull-request-comment) to find out more.

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