Converts a code into an ansi token type
@param {number} code
@returns {string}
function categoryForCode(code) {
    code = parseInt(code, 10);
    var result = null;

    if (code === 0) {
        result = 'all';
    } else if (code === 1) {
        result = 'bold';
    } else if ((2 < code && code < 5)) {
        result = 'underline';
    } else if ((4 < code && code < 7)) {
        result = 'blink';
    } else if (code === 8) {
        result = 'hide';
    } else if (code === 9) {
        result = 'strike';
    } else if ((29 < code && code < 38) || code === 39 || (89 < code && code < 98)) {
        result = 'foreground-color';
    } else if ((39 < code && code < 48) || code === 49 || (99 < code && code < 108)) {
        result = 'background-color';
    }

    return result;
}