fix: context type for CompatibilityRequestProps

[sisou]

The changes in PR #124 to make the H3EventContext extendable by userland types were insufficient to apply the type also to the CompatibilityEvent, which is the type of events for event handlers. I always got context.user: any when only declaring the context interface:

declare module 'h3' {
	interface H3EventContext {
		user: User,
	}
}

Because CompatibilityEvent can also be an IncomingMessage, which extends the CompatibilityRequestProps, which in turn still declares an un-extendable context: Record<string, any>. This gives CompatibilityEvent.context: H3EventContext | Record<string, any>, which gives any for all properties, even if H3EventContext is typed.

[pi0]

Thanks!