Update scrivo/highlight.php to v9.18.1.10

[digidux]

Hi! I can't update my project due to having packages that separately depend on this (which depends on scrivo/highlight.php to be at v9.18.1.9) and another package which depends on it being at v9.18.1.10. Thus concluding the best solution for tiptap-php to use the newest version of highlight.

This change seems to not interfere at all as per the changelog. I'll be more than happy to create the tiny pull request to make this happen. :)