NumericEntityUnescaper.translate throws an IllegalArgumentException if entityValue > MAX_CODE_POINT

We found that using the function StringEscapeUtils.unescapeHtml4 crashes if the argument is "�" and throws an IllegalArgumentException.

This happens because internally it calls the function NumericEntityUnescaper.translate and doesn't check if the value is bigger than 0x10FFFF (MAX_CODE_POINT) that is a check inside Character.toChar.

Maybe we need to check that the entity value is less than Char.MAX_CODE_POINT.