Merge branch '4.4'

* 4.4:
  Fix travis script
  [Contracts] Fix branch alias
  minor fix for wrong case
  [HttpFoundation] Fix `getMaxFilesize`
  [Cache] fix warning on PHP 7.4
  [Console] fix warning on PHP 7.4
  let BlockingStoreInterface extend PersistingStoreInterface
  Don't add value of (default/static) objects to the signature
  fix(yml): fix comment in milti line value
  Make sure trace_level is always defined
  Ensure $request->hasSession() is always checked before calling getSession()
  Fix bindings and tagged_locator
  Recompile container when translations directory changes

Author: nicolas-grekas

Loader/PhpFileLoader.php

@@ -40,7 +40,7 @@ public function load($file, string $type = null)
 
         // the closure forbids access to the private scope in the included file
         $loader = $this;
-        $load = \Closure::bind(function ($file) use ($loader) {
+        $load = \Closure::bind(static function ($file) use ($loader) {
             return include $file;
         }, null, ProtectedPhpFileLoader::class);