Docs: add missing return type void annotations

src/WPIntegration/TestCase.php

@@ -59,6 +59,8 @@ abstract class TestCase extends WP_UnitTestCase {
 
 	/**
 	 * Wrapper method for the `set_up_before_class()` method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	public static function setUpBeforeClass() {
 		parent::setUpBeforeClass();
@@ -67,6 +69,8 @@ public static function setUpBeforeClass() {
 
 	/**
 	 * Wrapper method for the `tear_down_after_class()` method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	public static function tearDownAfterClass() {
 		static::tear_down_after_class();
@@ -75,6 +79,8 @@ public static function tearDownAfterClass() {
 
 	/**
 	 * Wrapper method for the `set_up()` method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	public function setUp() {
 		parent::setUp();
@@ -83,6 +89,8 @@ public function setUp() {
 
 	/**
 	 * Wrapper method for the `tear_down()` method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	public function tearDown() {
 		$this->tear_down();
@@ -91,6 +99,8 @@ public function tearDown() {
 
 	/**
 	 * Wrapper method for the `assert_pre_conditions()` method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	protected function assertPreConditions() {
 		parent::assertPreConditions();
@@ -99,6 +109,8 @@ protected function assertPreConditions() {
 
 	/**
 	 * Wrapper method for the `assert_post_conditions()` method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	protected function assertPostConditions() {
 		parent::assertPostConditions();
@@ -107,31 +119,43 @@ protected function assertPostConditions() {
 
 	/**
 	 * Placeholder method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	public static function set_up_before_class() {}
 
 	/**
 	 * Placeholder method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	public static function tear_down_after_class() {}
 
 	/**
 	 * Placeholder method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	protected function set_up() {}
 
 	/**
 	 * Placeholder method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	protected function tear_down() {}
 
 	/**
 	 * Placeholder method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	protected function assert_pre_conditions() {}
 
 	/**
 	 * Placeholder method for forward-compatibility with WP 5.9.
+	 *
+	 * @return void
 	 */
 	protected function assert_post_conditions() {}
 }