PHP 8.4: Declare types nullable explicitly

https://wiki.php.net/rfc/deprecate-implicitly-nullable-types

Author: W0rma

src/Codeception/Lib/Connector/Yii2.php

@@ -250,7 +250,7 @@ public function getCsrfParamName(): string
         return $this->getApplication()->request->csrfParam;
     }
 
-    public function startApp(\yii\log\Logger $logger = null): void
+    public function startApp(?\yii\log\Logger $logger = null): void
     {
         codecept_debug('Starting application');
         $config = require($this->configFile);

src/Codeception/Module/Yii2.php

@@ -723,11 +723,11 @@ public function grabComponent(string $component): null|object
      * $I->seeEmailIsSent(3);
      * ```
      *
-     * @param int $num
+     * @param int|null $num
      * @throws \Codeception\Exception\ModuleException
      * @part email
      */
-    public function seeEmailIsSent(int $num = null): void
+    public function seeEmailIsSent(?int $num = null): void
     {
         if ($num === null) {
             $this->assertNotEmpty($this->grabSentEmails(), 'emails were sent');