Update to laravel 7

vendor/symfony/http-foundation/AcceptHeader.php

@@ -11,6 +11,9 @@
 
 namespace Symfony\Component\HttpFoundation;
 
+// Help opcache.preload discover always-needed symbols
+class_exists(AcceptHeaderItem::class);
+
 /**
  * Represents an Accept-* header.
  *
@@ -44,15 +47,13 @@ class AcceptHeader
     /**
      * Builds an AcceptHeader instance from a string.
      *
-     * @param string $headerValue
-     *
      * @return self
      */
-    public static function fromString($headerValue)
+    public static function fromString(?string $headerValue)
     {
         $index = 0;
 
-        $parts = HeaderUtils::split((string) $headerValue, ',;=');
+        $parts = HeaderUtils::split($headerValue ?? '', ',;=');
 
         return new self(array_map(function ($subParts) use (&$index) {
             $part = array_shift($subParts);
@@ -78,11 +79,9 @@ class AcceptHeader
     /**
      * Tests if header has given value.
      *
-     * @param string $value
-     *
      * @return bool
      */
-    public function has($value)
+    public function has(string $value)
     {
         return isset($this->items[$value]);
     }
@@ -90,11 +89,9 @@ class AcceptHeader
     /**
      * Returns given value's item, if exists.
      *
-     * @param string $value
-     *
      * @return AcceptHeaderItem|null
      */
-    public function get($value)
+    public function get(string $value)
     {
         return $this->items[$value] ?? $this->items[explode('/', $value)[0].'/*'] ?? $this->items['*/*'] ?? $this->items['*'] ?? null;
     }
@@ -127,11 +124,9 @@ class AcceptHeader
     /**
      * Filters items on their value using given regex.
      *
-     * @param string $pattern
-     *
      * @return self
      */
-    public function filter($pattern)
+    public function filter(string $pattern)
     {
         return new self(array_filter($this->items, function (AcceptHeaderItem $item) use ($pattern) {
             return preg_match($pattern, $item->getValue());
@@ -153,7 +148,7 @@ class AcceptHeader
     /**
      * Sorts items by descending quality.
      */
-    private function sort()
+    private function sort(): void
     {
         if (!$this->sorted) {
             uasort($this->items, function (AcceptHeaderItem $a, AcceptHeaderItem $b) {