negative numbers are not working as expected

[a-x-]

the - sign is not showing

[amaschas]

Ditto on this. Seems to convert all values to positive for output.

[cidevant]

+1

        <NumberFormat
          value={realNumber}
          allowNegative={true}
          displayType="text"
          thousandSeparator=" "
          decimalPrecision={false}
        />

Warning: Unknown prop `allowNegative` on <span> tag. Remove this prop from the element. For details, see https://fb.me/react-unknown-prop
    in span (created by NumberFormat)
    in NumberFormat (created by CurrencyFormatter)

[s-yadav]

@cidevant This warning should not come on the latest version.

[s-yadav]

@a-x- added negative number support let me know if you find any bug on that