Merge branch '5.1' into 5.2

* 5.1:
  µCS fix
  CS fix
  CS fix
  [travis] use PHP 8.0 to patch return types and run deps=low
  Add me as a Notifier code owner
  Update sl_SI translations
  Don't trigger deprecation for deprecated aliases pointing to deprecated definitions
  [HttpFoundation] use atomic writes in MockFileSessionStorage
  Make EmailMessage & SmsMessage transport nullable
  remove unused argument
  [DI] fix param annotation
  [Config] Add \Symfony\Component\Config\Loader::load() return type
  Simplify PHP CS Fixer config
  Rename normalize param

Tests/ApplicationTest.php

@@ -1826,7 +1826,7 @@ public function testSignal()
         $application = new Application();
         $application->setAutoExit(false);
         $application->setDispatcher($dispatcher);
-        $application->setSignalsToDispatchEvent(SIGALRM);
+        $application->setSignalsToDispatchEvent(\SIGALRM);
         $application->add($command);
 
         $this->assertFalse($command->signaled);
@@ -1909,7 +1909,7 @@ class SignableCommand extends Command implements SignalableCommandInterface
 
     public function getSubscribedSignals(): array
     {
-        return [SIGALRM];
+        return [\SIGALRM];
     }
 
     public function handleSignal(int $signal): void

Tests/Output/ConsoleSectionOutputTest.php

@@ -26,7 +26,7 @@ class ConsoleSectionOutputTest extends TestCase
 
     protected function setUp(): void
     {
-        $this->stream = fopen('php://memory', 'r+b', false);
+        $this->stream = fopen('php://memory', 'r+', false);
     }
 
     protected function tearDown(): void
@@ -143,7 +143,7 @@ public function testMultipleSectionsOutput()
 
     public function testClearSectionContainingQuestion()
     {
-        $inputStream = fopen('php://memory', 'r+b', false);
+        $inputStream = fopen('php://memory', 'r+', false);
         fwrite($inputStream, "Batman & Robin\n");
         rewind($inputStream);