upgrade to phpstan level 6

src/Factories/Annotations/Depends.php

@@ -14,6 +14,10 @@ final class Depends
 {
     /**
      * Adds annotations regarding the "depends" feature.
+     *
+     * @param array<string> $annotations
+     *
+     * @return array<string>
      */
     public function add(TestCaseMethodFactory $method, array $annotations): array
     {

src/Factories/Annotations/Groups.php

@@ -13,6 +13,10 @@ final class Groups
 {
     /**
      * Adds annotations regarding the "groups" feature.
+     *
+     * @param array<string> $annotations
+     *
+     * @return array<string>
      */
     public function add(TestCaseMethodFactory $method, array $annotations): array
     {

src/Factories/TestCaseFactory.php

@@ -98,6 +98,8 @@ final class TestCaseFactory
 
     /**
      * Creates a Test Case class using a runtime evaluate.
+     *
+     * @param array<TestCaseMethodFactory> $methods
      */
     public function evaluate(string $filename, array $methods): string
     {