Blake min bytes seems to be incorrect

The GenericHash interface defines `BLAKE2B_BYTES_MIN = 16` but from experimentation, the library is happy to produce outputs as low as 1 byte.

https://github.com/terl/lazysodium-java/blob/64dc78554f45eb9b81e74354d61eba4e3da2452b/src/main/java/com/goterl/lazysodium/interfaces/GenericHash.java#L20