fix typed array mvalue serialization

[xxshady]

For some reason HasBuffer doesn't work as it should and according to MDN docs buffer is readonly and should always present in TypedArray

alt.Events.on('test', (...data) => {
  alt.log({ data })
})
alt.Events.emit('test', new Uint8Array([1, 2, 3]))

before: { data: [ undefined ] }

after:

{
  data: [
    ArrayBuffer {
      [Uint8Contents]: <01 02 03>,
      byteLength: 3
    }
  ]
}