Use assertSame to ensure return value is of same type

Changes `assertEquals(3001, $new->getPort())` to `assertSame(3001,
$new->getPort())`, which better tests that the return value is of the
expected type, as well as value.

Author: weierophinney

test/UriTest.php

@@ -161,7 +161,7 @@ public function testWithPortReturnsSameInstanceWithProvidedPortIsSameAsBefore()
         $uri = new Uri('https://user:[email protected]:3001/foo?bar=baz#quz');
         $new = $uri->withPort('3001');
         $this->assertSame($uri, $new);
-        $this->assertEquals(3001, $new->getPort());
+        $this->assertSame(3001, $new->getPort());
     }
 
     public function invalidPorts()