Support Uint16Array for Vec<u16> and Uint32Array for Vec<u32>

[nedsalk]

#2018 and #2784 add support for Uint8Array to be passed where Vec<u8> is expected. We can extend that to support Uint16Array and Uint32Array as well.

Vec<u64> doesn't have a JavaScript equivalent so it'd still remain Vec<BigNumberish>. BigNumberish is defined as string | number | BN, but number only supports up to We might want to constrain Vec<u64> to string | BN because the maximum safe integer is less than u64. I'm not sure about this one, though, because people should know this info when dealing with large javascript numbers and it would be a breaking change. Still, I'm mentioning it for completeness.