PHP 8.3 | RequestsTest::testHasCapabilitiesFailsForUnsupportedCapabil…

…ities(): fix deprecation notices for ReflectionProperty::setValue()

The `ReflectionProperty::setValue()` method supports three method signatures, two of which are deprecated as of PHP 8.3.

This adjusts the call to `ReflectionProperty::setValue()` in the `HasCapabilitiesTest` to pass `null` as the "object" for setting the value of a static property to make the method call cross-version compatible.

Ref: https://wiki.php.net/rfc/deprecate_functions_with_overloaded_signatures#reflectionpropertysetvalue

tests/RequestsTest.php

@@ -337,11 +337,11 @@ public function testHasCapabilitiesSucceedsForDetectingSsl() {
 	public function testHasCapabilitiesFailsForUnsupportedCapabilities() {
 		$transports = new ReflectionProperty(Requests::class, 'transports');
 		$transports->setAccessible(true);
-		$transports->setValue([TestTransportMock::class]);
+		$transports->setValue(null, [TestTransportMock::class]);
 
 		$result = Requests::has_capabilities(['time-travel' => true]);
 
-		$transports->setValue([]);
+		$transports->setValue(null, []);
 		$transports->setAccessible(false);
 
 		$this->assertFalse($result);