Merge branch '4.3' into 4.4

* 4.3:
  [Cache] clean tags folder on invalidation
  [Cache] remove implicit dependency on symfony/filesystem
  Allow to set cookie_samesite to 'none'
  [VarDumper] fix array key error for class SymfonyCaster
  Adds missing translations for no nb
  [HttpKernel] fix $dotenvVars in data collector
  Add the missing translations for the Swedish ("sv") locale
  bumped Symfony version to 4.3.6
  updated VERSION for 4.3.5
  updated CHANGELOG for 4.3.5
  bumped Symfony version to 3.4.33
  updated VERSION for 3.4.32
  update CONTRIBUTORS for 3.4.32
  updated CHANGELOG for 3.4.32
  [Messenger] DoctrineTransport: ensure auto setup is only done once
  [Form][DateTimeImmutableToDateTimeTransformer] Preserve microseconds and use \DateTime::createFromImmutable() when available
  [Crawler] document $default as string|null

Author: nicolas-grekas

Crawler.php

@@ -595,18 +595,18 @@ public function nodeName()
      *
      * Pass true as the 2nd argument to normalize whitespaces.
      *
-     * @param mixed $default             When provided and the current node is empty, this value is returned and no exception is thrown
-     * @param bool  $normalizeWhitespace Whether whitespaces should be trimmed and normalized to single spaces
+     * @param string|null $default             When not null: the value to return when the current node is empty
+     * @param bool        $normalizeWhitespace Whether whitespaces should be trimmed and normalized to single spaces
      *
      * @return string The node value
      *
      * @throws \InvalidArgumentException When current node is empty
      */
-    public function text(/* $default = null, bool $normalizeWhitespace = false */)
+    public function text(/* string $default = null, bool $normalizeWhitespace = false */)
     {
         if (!$this->nodes) {
-            if (0 < \func_num_args()) {
-                return func_get_arg(0);
+            if (0 < \func_num_args() && null !== func_get_arg(0)) {
+                return (string) func_get_arg(0);
             }
 
             throw new \InvalidArgumentException('The current node list is empty.');
@@ -624,17 +624,17 @@ public function text(/* $default = null, bool $normalizeWhitespace = false */)
     /**
      * Returns the first node of the list as HTML.
      *
-     * @param mixed $default When provided and the current node is empty, this value is returned and no exception is thrown
+     * @param string|null $default When not null: the value to return when the current node is empty
      *
      * @return string The node html
      *
      * @throws \InvalidArgumentException When current node is empty
      */
-    public function html(/* $default = null */)
+    public function html(/* string $default = null */)
     {
         if (!$this->nodes) {
-            if (0 < \func_num_args()) {
-                return func_get_arg(0);
+            if (0 < \func_num_args() && null !== func_get_arg(0)) {
+                return (string) func_get_arg(0);
             }
 
             throw new \InvalidArgumentException('The current node list is empty.');