Support for BigInt64Array for adjency list

[phuhl]

Hi, thank you for this package!

I noticed though, that for some reason, BigInt64Array and BigUint64Array are not listed in TypedArrayConstructors which hinders usage in e.g. AdjacencyListMixin:

export type TypedArrayConstructors =
  | Constructor<Int8Array>
  | Constructor<Uint8Array>
  | Constructor<Uint8ClampedArray>
  | Constructor<Int16Array>
  | Constructor<Uint16Array>
  | Constructor<Int32Array>
  | Constructor<Uint32Array>
  | Constructor<Float32Array>
  | Constructor<Float64Array>;

Is there a technical reason or could it be easily added?

Thanks, cheers