Update CNAMETest.php

tests/unit/Network/Validators/CNAMETest.php

@@ -12,12 +12,12 @@ class CNAMETest extends TestCase
      */
     protected $object = null;
 
-    public function setUp()
+    public function setUp(): void
     {
         $this->object = new CNAME('appwrite.io');
     }
 
-    public function tearDown()
+    public function tearDown(): void
     {
     }
 
@@ -31,4 +31,4 @@ class CNAMETest extends TestCase
         $this->assertEquals($this->object->isValid('test1.appwrite.org'), false);
         $this->assertEquals($this->object->isValid('test1.appwrite.org'), false);
     }
-}
+}