Replace `requireAllProps` with `satisfies` to cut down on runtime code and indirection.

[igalklebanov]

Hey 👋

Nowadays, we have TypeScript's satisfies AllProps<T> to achieve the same effect requireAllProps<T> has - ensuring a transormer visitor returns a node with all of it's properties. No runtime code needed.

This requires bumping the minimum TypeScript version to at least 4.9.

According to brief unreliable check, this could reduce ~1.4kb in minified size. Small saving alone, but with other things we could really make Kysely more lightweight, while keeping the same feature set AND staying as maintainable.

[thelinuxlich]

+1 on bumping minimal TS version

[igalklebanov]

+1 on bumping minimal TS version

This is already underway, with >=5.0 (~80% of weekly downloads) being the current goal.