urls with cyrillic bug

[thegobot]

Example

$linkify = new \Nahid\Linkify\Linkify();
$text = $linkify->process("https://ru.wikipedia.org/wiki/Бультерьер");
var_dump($text);
var_dump(json_encode($text));

string(114) "<a href="https://ru.wikipedia.org/wiki/Бультерье�">https://ru.wikipedia.org/wiki/Бультерье�</a>�"

bool(false)

Add to https://github.com/nahid/linkify/blob/master/src/Nahid/Linkify/Linkify.php#L142
regexp modifier u

        $pattern = '~(?xi)
              (?:
                ((ht|f)tps?://)                    # scheme://
                |                                  #   or
                www\d{0,3}\.                       # "www.", "www1.", "www2." ... "www999."
                |                                  #   or
                www\-                              # "www-"
                |                                  #   or
                [a-z0-9.\-]+\.[a-z]{2,4}(?=/)      # looks like domain name followed by a slash
              )
              (?:                                  # Zero or more:
                [^\s()<>]+                         # Run of non-space, non-()<>
                |                                  #   or
                \(([^\s()<>]+|(\([^\s()<>]+\)))*\) # balanced parens, up to 2 levels
              )*
              (?:                                  # End with:
                \(([^\s()<>]+|(\([^\s()<>]+\)))*\) # balanced parens, up to 2 levels
                |                                  #   or
                [^\s`!\-()\[\]{};:\'".,<>?«»“”‘’]  # not a space or one of these punct chars
              )
        ~u';