number method
Gets 64-bit unsiged integer from the message digest.
If endian
is Endian.little, it will treat the digest bytes as a little
endian number; Otherwise, if endian
is Endian.big, it will treat the
digest bytes as a big endian number.
Implementation
int number([Endian endian = Endian.big]) =>
toBigInt(bytes, msbFirst: endian == Endian.big).toUnsigned(64).toInt();