Set PHPStan to level 8

Author: smnandre

phpstan.neon.dist

@@ -1,5 +1,5 @@
 parameters:
-    level: 7
+    level: 8
     reportUnmatchedIgnoredErrors: false
     paths:
         - src

src/Api/Label/GithubLabelApi.php

@@ -115,7 +115,7 @@ public function getAllLabelsForRepository(Repository $repository): array
     }
 
     /**
-     * @return string[]
+     * @return list<string>
      */
     public function getComponentLabelsForRepository(Repository $repository): array
     {
@@ -136,7 +136,7 @@ public function getComponentLabelsForRepository(Repository $repository): array
     }
 
     /**
-     * @return array<string, array{name: string, color: string}>
+     * @return array<array{name: string, color: string}>
      */
     private function getAllLabels(Repository $repository): array
     {

src/Subscriber/AutoUpdateTitleWithLabelSubscriber.php

@@ -73,7 +73,7 @@ public function onPullRequest(GitHubEvent $event): void
         }
 
         // Clean string from all HTML chars and remove whitespace at the beginning
-        $prTitle = preg_replace('@^[\h\s]+@u', '', html_entity_decode($prTitle));
+        $prTitle = (string) preg_replace('@^[\h\s]+@u', '', html_entity_decode($prTitle));
 
         // Add back labels
         $prTitle = trim($prPrefix.' '.trim($prTitle));