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diff --git a/vendor/symfony/polyfill-intl-normalizer/Normalizer.php b/vendor/symfony/polyfill-intl-normalizer/Normalizer.php
new file mode 100644
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+++ b/vendor/symfony/polyfill-intl-normalizer/Normalizer.php
@@ -0,0 +1,310 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Polyfill\Intl\Normalizer;
+
+/**
+ * Normalizer is a PHP fallback implementation of the Normalizer class provided by the intl extension.
+ *
+ * It has been validated with Unicode 6.3 Normalization Conformance Test.
+ * See http://www.unicode.org/reports/tr15/ for detailed info about Unicode normalizations.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ *
+ * @internal
+ */
+class Normalizer
+{
+    public const FORM_D = \Normalizer::FORM_D;
+    public const FORM_KD = \Normalizer::FORM_KD;
+    public const FORM_C = \Normalizer::FORM_C;
+    public const FORM_KC = \Normalizer::FORM_KC;
+    public const NFD = \Normalizer::NFD;
+    public const NFKD = \Normalizer::NFKD;
+    public const NFC = \Normalizer::NFC;
+    public const NFKC = \Normalizer::NFKC;
+
+    private static $C;
+    private static $D;
+    private static $KD;
+    private static $cC;
+    private static $ulenMask = ["\xC0" => 2, "\xD0" => 2, "\xE0" => 3, "\xF0" => 4];
+    private static $ASCII = "\x20\x65\x69\x61\x73\x6E\x74\x72\x6F\x6C\x75\x64\x5D\x5B\x63\x6D\x70\x27\x0A\x67\x7C\x68\x76\x2E\x66\x62\x2C\x3A\x3D\x2D\x71\x31\x30\x43\x32\x2A\x79\x78\x29\x28\x4C\x39\x41\x53\x2F\x50\x22\x45\x6A\x4D\x49\x6B\x33\x3E\x35\x54\x3C\x44\x34\x7D\x42\x7B\x38\x46\x77\x52\x36\x37\x55\x47\x4E\x3B\x4A\x7A\x56\x23\x48\x4F\x57\x5F\x26\x21\x4B\x3F\x58\x51\x25\x59\x5C\x09\x5A\x2B\x7E\x5E\x24\x40\x60\x7F\x00\x01\x02\x03\x04\x05\x06\x07\x08\x0B\x0C\x0D\x0E\x0F\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F";
+
+    public static function isNormalized(string $s, int $form = self::FORM_C)
+    {
+        if (!\in_array($form, [self::NFD, self::NFKD, self::NFC, self::NFKC])) {
+            return false;
+        }
+        if (!isset($s[strspn($s, self::$ASCII)])) {
+            return true;
+        }
+        if (self::NFC == $form && preg_match('//u', $s) && !preg_match('/[^\x00-\x{2FF}]/u', $s)) {
+            return true;
+        }
+
+        return self::normalize($s, $form) === $s;
+    }
+
+    public static function normalize(string $s, int $form = self::FORM_C)
+    {
+        if (!preg_match('//u', $s)) {
+            return false;
+        }
+
+        switch ($form) {
+            case self::NFC: $C = true; $K = false; break;
+            case self::NFD: $C = false; $K = false; break;
+            case self::NFKC: $C = true; $K = true; break;
+            case self::NFKD: $C = false; $K = true; break;
+            default:
+                if (\defined('Normalizer::NONE') && \Normalizer::NONE == $form) {
+                    return $s;
+                }
+
+                if (80000 > \PHP_VERSION_ID) {
+                    return false;
+                }
+
+                throw new \ValueError('normalizer_normalize(): Argument #2 ($form) must be a a valid normalization form');
+        }
+
+        if ('' === $s) {
+            return '';
+        }
+
+        if ($K && null === self::$KD) {
+            self::$KD = self::getData('compatibilityDecomposition');
+        }
+
+        if (null === self::$D) {
+            self::$D = self::getData('canonicalDecomposition');
+            self::$cC = self::getData('combiningClass');
+        }
+
+        if (null !== $mbEncoding = (2 /* MB_OVERLOAD_STRING */ & (int) \ini_get('mbstring.func_overload')) ? mb_internal_encoding() : null) {
+            mb_internal_encoding('8bit');
+        }
+
+        $r = self::decompose($s, $K);
+
+        if ($C) {
+            if (null === self::$C) {
+                self::$C = self::getData('canonicalComposition');
+            }
+
+            $r = self::recompose($r);
+        }
+        if (null !== $mbEncoding) {
+            mb_internal_encoding($mbEncoding);
+        }
+
+        return $r;
+    }
+
+    private static function recompose($s)
+    {
+        $ASCII = self::$ASCII;
+        $compMap = self::$C;
+        $combClass = self::$cC;
+        $ulenMask = self::$ulenMask;
+
+        $result = $tail = '';
+
+        $i = $s[0] < "\x80" ? 1 : $ulenMask[$s[0] & "\xF0"];
+        $len = \strlen($s);
+
+        $lastUchr = substr($s, 0, $i);
+        $lastUcls = isset($combClass[$lastUchr]) ? 256 : 0;
+
+        while ($i < $len) {
+            if ($s[$i] < "\x80") {
+                // ASCII chars
+
+                if ($tail) {
+                    $lastUchr .= $tail;
+                    $tail = '';
+                }
+
+                if ($j = strspn($s, $ASCII, $i + 1)) {
+                    $lastUchr .= substr($s, $i, $j);
+                    $i += $j;
+                }
+
+                $result .= $lastUchr;
+                $lastUchr = $s[$i];
+                $lastUcls = 0;
+                ++$i;
+                continue;
+            }
+
+            $ulen = $ulenMask[$s[$i] & "\xF0"];
+            $uchr = substr($s, $i, $ulen);
+
+            if ($lastUchr < "\xE1\x84\x80" || "\xE1\x84\x92" < $lastUchr
+                || $uchr < "\xE1\x85\xA1" || "\xE1\x85\xB5" < $uchr
+                || $lastUcls) {
+                // Table lookup and combining chars composition
+
+                $ucls = $combClass[$uchr] ?? 0;
+
+                if (isset($compMap[$lastUchr.$uchr]) && (!$lastUcls || $lastUcls < $ucls)) {
+                    $lastUchr = $compMap[$lastUchr.$uchr];
+                } elseif ($lastUcls = $ucls) {
+                    $tail .= $uchr;
+                } else {
+                    if ($tail) {
+                        $lastUchr .= $tail;
+                        $tail = '';
+                    }
+
+                    $result .= $lastUchr;
+                    $lastUchr = $uchr;
+                }
+            } else {
+                // Hangul chars
+
+                $L = \ord($lastUchr[2]) - 0x80;
+                $V = \ord($uchr[2]) - 0xA1;
+                $T = 0;
+
+                $uchr = substr($s, $i + $ulen, 3);
+
+                if ("\xE1\x86\xA7" <= $uchr && $uchr <= "\xE1\x87\x82") {
+                    $T = \ord($uchr[2]) - 0xA7;
+                    0 > $T && $T += 0x40;
+                    $ulen += 3;
+                }
+
+                $L = 0xAC00 + ($L * 21 + $V) * 28 + $T;
+                $lastUchr = \chr(0xE0 | $L >> 12).\chr(0x80 | $L >> 6 & 0x3F).\chr(0x80 | $L & 0x3F);
+            }
+
+            $i += $ulen;
+        }
+
+        return $result.$lastUchr.$tail;
+    }
+
+    private static function decompose($s, $c)
+    {
+        $result = '';
+
+        $ASCII = self::$ASCII;
+        $decompMap = self::$D;
+        $combClass = self::$cC;
+        $ulenMask = self::$ulenMask;
+        if ($c) {
+            $compatMap = self::$KD;
+        }
+
+        $c = [];
+        $i = 0;
+        $len = \strlen($s);
+
+        while ($i < $len) {
+            if ($s[$i] < "\x80") {
+                // ASCII chars
+
+                if ($c) {
+                    ksort($c);
+                    $result .= implode('', $c);
+                    $c = [];
+                }
+
+                $j = 1 + strspn($s, $ASCII, $i + 1);
+                $result .= substr($s, $i, $j);
+                $i += $j;
+                continue;
+            }
+
+            $ulen = $ulenMask[$s[$i] & "\xF0"];
+            $uchr = substr($s, $i, $ulen);
+            $i += $ulen;
+
+            if ($uchr < "\xEA\xB0\x80" || "\xED\x9E\xA3" < $uchr) {
+                // Table lookup
+
+                if ($uchr !== $j = $compatMap[$uchr] ?? ($decompMap[$uchr] ?? $uchr)) {
+                    $uchr = $j;
+
+                    $j = \strlen($uchr);
+                    $ulen = $uchr[0] < "\x80" ? 1 : $ulenMask[$uchr[0] & "\xF0"];
+
+                    if ($ulen != $j) {
+                        // Put trailing chars in $s
+
+                        $j -= $ulen;
+                        $i -= $j;
+
+                        if (0 > $i) {
+                            $s = str_repeat(' ', -$i).$s;
+                            $len -= $i;
+                            $i = 0;
+                        }
+
+                        while ($j--) {
+                            $s[$i + $j] = $uchr[$ulen + $j];
+                        }
+
+                        $uchr = substr($uchr, 0, $ulen);
+                    }
+                }
+                if (isset($combClass[$uchr])) {
+                    // Combining chars, for sorting
+
+                    if (!isset($c[$combClass[$uchr]])) {
+                        $c[$combClass[$uchr]] = '';
+                    }
+                    $c[$combClass[$uchr]] .= $uchr;
+                    continue;
+                }
+            } else {
+                // Hangul chars
+
+                $uchr = unpack('C*', $uchr);
+                $j = (($uchr[1] - 224) << 12) + (($uchr[2] - 128) << 6) + $uchr[3] - 0xAC80;
+
+                $uchr = "\xE1\x84".\chr(0x80 + (int) ($j / 588))
+                       ."\xE1\x85".\chr(0xA1 + (int) (($j % 588) / 28));
+
+                if ($j %= 28) {
+                    $uchr .= $j < 25
+                        ? ("\xE1\x86".\chr(0xA7 + $j))
+                        : ("\xE1\x87".\chr(0x67 + $j));
+                }
+            }
+            if ($c) {
+                ksort($c);
+                $result .= implode('', $c);
+                $c = [];
+            }
+
+            $result .= $uchr;
+        }
+
+        if ($c) {
+            ksort($c);
+            $result .= implode('', $c);
+        }
+
+        return $result;
+    }
+
+    private static function getData($file)
+    {
+        if (file_exists($file = __DIR__.'/Resources/unidata/'.$file.'.php')) {
+            return require $file;
+        }
+
+        return false;
+    }
+}