Derive a private key from a password using count iterations of SHA3-256

@param {string} password - A wallet password
@param {number} count - A number of iterations above 0

@return {object} - The derived private key
function(password, count) {
    // Errors
    if(!password) throw new Error('Missing argument !');
    if(!count || count <= 0) throw new Error('Please provide a count number above 0');
    // Processing
    let data = password;
    console.time('sha3^n generation time');
    for (let i = 0; i < count; ++i) {
        data = CryptoJS.SHA3(data, {
            outputLength: 256
        });
    }
    console.timeEnd('sha3^n generation time');
    // Result
    return {
        'priv': CryptoJS.enc.Hex.stringify(data)
    };
}