Work on the function to convert an integer to any base and return the result as string

[nanafox]

Here's the prototype to use

#include "main.h"

/**
 * _itob - convert integer to the specified base and stores the result
 * as a string
 *
 * @number: the number to convert
 * @buffer: the string buffer to store the result
 * @base: the base to convert @number to
 */
void _itob(ssize_t number, char *buffer, int base);

Your function should handle bases 2, 8, 10, and 16. The main.h has macros for these tokens, use them.

Example: BIN is assigned to 2, HEX to 16