Fix issue where initSwiftExtension types were expected to be homogenous

[PadraigK]

#initSwiftExtension(cdecl: "swift_entry_point", types: [
    Jumper.self,
    Circle.self,
    MainScene.self,
    HUD.self,
    BaseScreen.self,
    Screens.self,
    AboutScreen.self,
])

This code was failing with:

CircleJumpDriver.swift:19:5: error: cannot convert value of type 'BaseScreen.Type' to expected element type 'Array<AboutScreen.Type>.ArrayLiteralElement' (aka 'AboutScreen.Type')
BaseScreen.self,

This is because the generic on the initSwiftExtension definition was set up to expect an array of identically typed classes.

This PR changes the type to just be:[Wrapped.Type] which allows any types that conform to Wrapped, as opposed to a being an array of a single specific type that conforms.

[migueldeicaza]

Thank you for the patch!