Update for PHP 7.4 support

Removes deprecation notice. https://www.php.net/manual/en/reflectiontype.tostring.php

Author: Diederik Noordhuis

lib/Phpfastcache/Config/ConfigurationOption.php

@@ -134,8 +134,8 @@ public function __construct(...$args)
                     $typeHintGot = \is_object($value) ? \get_class($value) : \gettype($value);
                     $reflectionMethod = new ReflectionMethod($this, $method);
                     $parameter = $reflectionMethod->getParameters()[0] ?? null;
-                    $typeHintExpected = ($parameter instanceof ReflectionParameter ? ($parameter->getType() === 'object' ? $parameter->getClass() : $parameter->getType(
-                    )) : 'Unknown type');
+                    $typeHintExpected = ($parameter instanceof ReflectionParameter ? ($parameter->getType()->getName() === 'object' ? $parameter->getClass() : $parameter->getType(
+                    )->getName()) : 'Unknown type');
 
                     throw new PhpfastcacheInvalidConfigurationException(
                         \sprintf(