PHPUnit 9 | Update deprecation notices for assertObject[Not]HasAttrib…

…ute()

... now PHPUnit 10.1.0 introduces the `assertObjectHasProperty()` and `assertObjectNotHasProperty()` methods.

Refs:
* sebastianbergmann#5231
* sebastianbergmann@f18856c

src/Framework/Assert.php

@@ -1304,7 +1304,7 @@ public static function assertClassNotHasStaticAttribute(string $attributeName, s
      */
     public static function assertObjectHasAttribute(string $attributeName, $object, string $message = ''): void
     {
-        self::createWarning('assertObjectHasAttribute() is deprecated and will be removed in PHPUnit 10.');
+        self::createWarning('assertObjectHasAttribute() is deprecated and will be removed in PHPUnit 10. Refactor your test to use assertObjectHasProperty() (PHPUnit 10.1.0+) instead.');
 
         if (!self::isValidObjectAttributeName($attributeName)) {
             throw InvalidArgumentException::create(1, 'valid attribute name');
@@ -1334,7 +1334,7 @@ public static function assertObjectHasAttribute(string $attributeName, $object,
      */
     public static function assertObjectNotHasAttribute(string $attributeName, $object, string $message = ''): void
     {
-        self::createWarning('assertObjectNotHasAttribute() is deprecated and will be removed in PHPUnit 10.');
+        self::createWarning('assertObjectNotHasAttribute() is deprecated and will be removed in PHPUnit 10. Refactor your test to use assertObjectNotHasProperty() (PHPUnit 10.1.0+) instead.');
 
         if (!self::isValidObjectAttributeName($attributeName)) {
             throw InvalidArgumentException::create(1, 'valid attribute name');