Discussion for a new feature - changedSince option

[IShungite]

Runs tests related to the changes since the provided branch or commit hash. If the current branch has diverged from the given branch, then only changes made locally will be tested

Jest has this feature and it's super useful.
It considerably reduces CI testing time.
https://jestjs.io/docs/en/cli.html#--changedsince

[stale]

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