Decodes a base32-encoded string into bytes using the Zooko alphabet (also known as z-base-32).
decodeZooko(string)
string
A base32-encoded string. Must not contain any whitespace.
A Uint8Array with decoded bytes.
Throws an error if the string is not a valid base64 string.
base32.decodeZooko("yrby89a")
Uint8Array [1, 2, 3, 255]