chore: disable clean flatten for deploy

[codecov[bot]]

Codecov Report

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

Project coverage is 93.15%. Comparing base (0cfd8da) to head (ce79d56).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #141 +/- ## ========================================= Coverage 93.15% 93.15% Complexity 65 65 ========================================= Files 9 9 Lines 263 263 Branches 22 22 ========================================= Hits 245 245 Misses 8 8 Partials 10 10 ```

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