Merge branch '5.0' into 5.1

* 5.0:
  fix merge
  Require PHPUnit 9.3 on PHP 8
  [Cache] fix catching auth errors
  Fix CS
  [FrameworkBundle] set default session.handler alias if handler_id is not provided
  Fix CS
  Readability update
  Fix checks for phpunit releases on Composer 2 (resolves #37601)
  [Serializer] Support multiple levels of discriminator mapping
  Use hexadecimal numerals instead of hexadecimals in strings to represent error codes.
  [SCA] Minor fixes on tests
  [WebProfilerBundle] modified url generation to use absolute urls
  [Mailer] Fix reply-to functionality in the SendgridApiTransport
  [Mime] Fix compat with HTTP requests
  ticket_36879 - Fix mandrill raw http request setting from email/name

Author: nicolas-grekas

Tests/PhpExecutableFinderTest.php

@@ -41,9 +41,9 @@ public function testFindArguments()
         $f = new PhpExecutableFinder();
 
         if ('phpdbg' === \PHP_SAPI) {
-            $this->assertEquals($f->findArguments(), ['-qrr'], '::findArguments() returns phpdbg arguments');
+            $this->assertEquals(['-qrr'], $f->findArguments(), '::findArguments() returns phpdbg arguments');
         } else {
-            $this->assertEquals($f->findArguments(), [], '::findArguments() returns no arguments');
+            $this->assertEquals([], $f->findArguments(), '::findArguments() returns no arguments');
         }
     }