Update dependency @mathigon/core to v1.1.19 - autoclosed

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This PR contains the following updates:

Package	Type	Update	Change
@mathigon/core (source)	dependencies	patch	1.1.18 -> 1.1.19

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Release Notes

mathigon/core.js (@​mathigon/core)

### [`v1.1.19`](https://togithub.com/mathigon/core.js/compare/017e9e2b285b524f68a434fe998cd33c9555ee75...a13ac262e9696800b7765db8c35cc65eb0ae3270) [Compare Source](https://togithub.com/mathigon/core.js/compare/017e9e2b285b524f68a434fe998cd33c9555ee75...a13ac262e9696800b7765db8c35cc65eb0ae3270)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box