Update dependency @mathigon/core to v1.1.9

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@mathigon/core (source)	1.1.8 -> 1.1.9

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Release Notes

mathigon/core.js

### [`v1.1.9`](https://togithub.com/mathigon/core.js/compare/v1.1.8...d3ae591679a36df350d28ac7fb6460bec45d0435) [Compare Source](https://togithub.com/mathigon/core.js/compare/v1.1.8...d3ae591679a36df350d28ac7fb6460bec45d0435)

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Configuration

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