Request: Return Session instead of SessionInterface

See #233

Author: ondrejmirtes

stubs/Symfony/Component/HttpFoundation/Request.stub

@@ -26,4 +26,9 @@ class Request
 	 */
 	public $cookies;
 
+    /**
+     * @return \Symfony\Component\HttpFoundation\Session\Session
+     */
+    public function getSession(): SessionInterface;
+
 }

tests/Type/Symfony/data/request_get_session.php

@@ -1,14 +1,14 @@
 <?php declare(strict_types = 1);
 
-use Symfony\Component\HttpFoundation\Session\SessionInterface;
+use Symfony\Component\HttpFoundation\Session\Session;
 use function PHPStan\Testing\assertType;
 
 /** @var \Symfony\Component\HttpFoundation\Request $request */
 $request = doRequest();
 
 $session1 = $request->getSession();
-assertType(SessionInterface::class, $request->getSession());
+assertType(Session::class, $request->getSession());
 
 if ($request->hasSession()) {
-	assertType(SessionInterface::class, $request->getSession());
+	assertType(Session::class, $request->getSession());
 }

tests/Type/Symfony/data/request_get_session_null.php

@@ -1,14 +1,14 @@
 <?php declare(strict_types = 1);
 
-use Symfony\Component\HttpFoundation\Session\SessionInterface;
+use Symfony\Component\HttpFoundation\Session\Session;
 use function PHPStan\Testing\assertType;
 
 /** @var \Symfony\Component\HttpFoundation\Request $request */
 $request = doRequest();
 
 $session1 = $request->getSession();
-assertType(SessionInterface::class . '|null', $request->getSession());
+assertType(Session::class . '|null', $request->getSession());
 
 if ($request->hasSession()) {
-	assertType(SessionInterface::class, $request->getSession());
+	assertType(Session::class, $request->getSession());
 }