BKCurrencyTextField maximum fraction digits can not be 3.

[KanybekMomukeyev]

Hi, thanks for sharing this great library.
I have problem with maximum fraction digits, when this number is equal to 3.
for ex in BKCurrencyTextField.m file:

_numberFormatter = [[NSNumberFormatter alloc] init];
_numberFormatter.numberStyle = NSNumberFormatterCurrencyStyle;

    
    [_numberFormatter setMaximumFractionDigits:3];
    [_numberFormatter setCurrencyCode:@"KGS"];
    [_numberFormatter setCurrencySymbol:@""];
    [_numberFormatter setLocale:[NSLocale localeWithLocaleIdentifier:@"ru_RU"]];
    
    
    _nonNumericRegularExpression = [BKMoneyUtils nonNumericRegularExpression];
    _numberCharacterSet = [BKMoneyUtils numberCharacterSet];
    
    self.placeholder = [_numberFormatter stringFromNumber:@(0)];

in this case if press any number, for ex 9, then press 0(zero) nothing changes.
Another words when setMaximumFractionDigits:2 everything is ok, but when 3 there is a problem.