Current implementation is differs from original C implementation on emojis

[skryukov]

Hey, I noticed that current implementation is differs from original C implementation on emojis. This might be a problem for multilingual systems.

Example with the string from Readme:

#include <stdio.h>

unsigned long hash(unsigned char *str) {
        unsigned long hash = 5381;
        int c;
        while ((c = *str++))
                hash = ((hash << 5) + hash) ^ c;
        return hash & 0xFFFFFFFF;
}

int main() {
        unsigned char myString [] = "🦄🌈";

        printf("hash %ld\n", hash(myString));
        return 0;
}

// => hash 1642026147

[sindresorhus]

This is a limitation in integers in JS. We need to move to BigInt. Example: https://github.com/sindresorhus/fnv1a