[Bug] terrain prop does not reset to no-terrain when set to undefined

[Fabioni]

Description

Once terrain is enabled by something like terrain={source: 'terrain-dem', exaggeration: 1.5}; you can not disable it again by setting it to undefined. Setting is to null does work but throws a typescript error.

Expected Behavior

Typescript says terrain is terrain | undefined, so setting to undefined should disable terrain in maplibre.

Steps to Reproduce

Toggle terrain setting between terrain and undefined.

Environment

• Framework version: 4.7.1 or 5.1.0
• Browser: Chrome
• OS: Mac

Logs

No response