Remove prop-types dependency

[atl-mk]

This doesn't remove it entirely from the production package. It still comes through react-transition-group.

However, I don't see any need for a direct dependency on prop-types given the TS rewrite of v5?

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[atl-mk]

@Methuselah96 apologies, tagging you for visibility. You seem to be the most active maintainer

[Methuselah96]

Thanks!