fix: check using isset instead of !== null for possibly non-existent property

Author: SamMousa

Diff for: ecs.php

@@ -58,7 +58,8 @@
         ForbiddenFunctionsSniff::class => [
             'tests/**',
             'console/**'
-        ]
+        ],
+        'tests/_support/_generated'
     ]);
 
     //    $ecsConfig->skip([

Diff for: src/Codeception/Lib/Connector/Yii2.php

@@ -222,10 +222,7 @@ public function getInternalDomains(): array
         $domains = [$this->getDomainRegex($urlManager->hostInfo)];
         if ($urlManager->enablePrettyUrl) {
             foreach ($urlManager->rules as $rule) {
-                /**
-                 * @var \yii\web\UrlRule $rule
-                 */
-                if ($rule->host !== null) {
+                if (isset($rule->host)) {
                     $domains[] = $this->getDomainRegex($rule->host);
                 }
             }

Diff for: tests/Yii.stub

@@ -95,4 +95,12 @@ namespace yii\web {
         public function setScriptFile($path): void {}
     }
 
+    interface UrlRuleInterface{}
+    class UrlManager {
+        /**
+         * @var UrlRuleInterface[] $rules;
+         */
+        public array $rules = [];
+    }
+
 }