Codecov: ignore stubs

[codecov[bot]]

Codecov Report

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

Project coverage is 86.28%. Comparing base (70245c4) to head (b26cf4a).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #22 +/- ## =========================================== + Coverage 40.70% 86.28% +45.57% =========================================== Files 12 10 -2 Lines 479 226 -253 =========================================== Hits 195 195 + Misses 276 23 -253 Partials 8 8 ``` | [Flag](https://app.codecov.io/gh/NoUmlautsAllowed/gocook/pull/22/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/NoUmlautsAllowed/gocook/pull/22/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=None) | `86.28% <ø> (+45.57%)` | :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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