Add @internal annotations to internal traits

Author: kelunik

src/Internal/AsyncTestSetNameTrait.php

@@ -5,7 +5,11 @@
 use PHPUnit\Framework\TestCase;
 
 if ((new \ReflectionMethod(TestCase::class, 'setName'))->hasReturnType()) {
-    // PHPUnit 7+
+    /**
+     * PHPUnit 7+
+     *
+     * @internal
+     */
     trait AsyncTestSetNameTrait
     {
         /** @var string Temporary storage for actual test name. */
@@ -21,7 +25,11 @@ final public function setName(string $name): void
         }
     }
 } else {
-    // PHPUnit 6
+    /**
+     * PHPUnit 6
+     *
+     * @internal
+     */
     trait AsyncTestSetNameTrait
     {
         /** @var string Temporary storage for actual test name. */

src/Internal/AsyncTestSetUpTrait.php

@@ -6,7 +6,11 @@
 use PHPUnit\Framework\TestCase;
 
 if ((new \ReflectionMethod(TestCase::class, 'setUp'))->hasReturnType()) {
-    // PHPUnit 8+
+    /**
+     * PHPUnit 8+
+     *
+     * @internal
+     */
     trait AsyncTestSetUpTrait
     {
         /** @var bool */
@@ -20,7 +24,11 @@ protected function setUp(): void
         }
     }
 } else {
-    // PHPUnit 6 or 7
+    /**
+     * PHPUnit 6 or 7
+     *
+     * @internal
+     */
     trait AsyncTestSetUpTrait
     {
         /** @var bool */