Merge branch '5.2' into 5.3

* 5.2:
  Backport type fixes
  Fix CS
  Avoid triggering the autoloader in Deprecation::isLegacy()
  fix markdown markup
  Backport type fixes
  uzb translation
  [DependencyInjection] Fix doc blocks
  [DependencyInjection] Turn $defaultDeprecationTemplate into a constant
  [Form] better form doc types to support static analysis

Author: nicolas-grekas

Authenticator/Passport/Credentials/CustomCredentials.php

@@ -31,7 +31,7 @@ class CustomCredentials implements CredentialsInterface
      * @param callable $customCredentialsChecker the check function. If this function does not return `true`, a
      *                                           BadCredentialsException is thrown. You may also throw a more
      *                                           specific exception in the function.
-     * @param          $credentials
+     * @param mixed    $credentials
      */
     public function __construct(callable $customCredentialsChecker, $credentials)
     {

Firewall/ContextListener.php

@@ -319,7 +319,7 @@ private function safelyUnserialize(string $serializedToken)
     /**
      * @internal
      */
-    public static function handleUnserializeCallback($class)
+    public static function handleUnserializeCallback(string $class)
     {
         throw new \ErrorException('Class not found: '.$class, 0x37313bc);
     }