function toString(value) {
      return value == null ? '' : baseToString(value);
    }
Converts `value` to a string. An empty string is returned for `null`
and `undefined` values. The sign of `-0` is preserved.

@static
@memberOf _
@since 4.0.0
@category Lang
@param {*} value The value to convert.
@returns {string} Returns the converted string.
@example

_.toString(null);
// => ''

_.toString(-0);
// => '-0'

_.toString([1, 2, 3]);
// => '1,2,3'