[api] Update immutability-helper: 2.9.0 → 2.9.1 (patch)

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Here is everything you need to know about this update. Please take a good look at what changed and the test results before merging this pull request.

What changed?

✳️ immutability-helper (2.9.0 → 2.9.1) · Repo

Release Notes

2.9.1

Revert release to match 2.8.x since upgrading this release is not backwards compatible with typescript v2.x

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Commits

See the full diff on Github. The new version differs by more commits than we can show here.

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