Fix: Revert: remove most usages of util.promisify()

[emmercm]

Reverts emmercm/igir#1087

[github-actions[bot]]

:test_tube: Branch testing instructions

This pull request can be tested locally with the following command:

npm exec --yes -- "github:emmercm/igir#revert-1087-emmercm/remove-util-promisify" [commands..] [options]

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[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.67442% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 93.21%. Comparing base (9e14aad) to head (0bf22dd).

Files	Patch %	Lines
src/polyfill/fsPoly.ts	96.77%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1095 +/- ## ======================================= Coverage 93.20% 93.21% ======================================= Files 92 92 Lines 6066 6071 +5 Branches 1445 1447 +2 ======================================= + Hits 5654 5659 +5 Misses 391 391 Partials 21 21 ```

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[github-actions[bot]]

:lock: Inactive pull request lock

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

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