Merge branch '2.14.x' into 1.x

* 2.14.x:
  [Php 8] Update up to php 8 syntax
  Fix proxy example in README.md

Author: nicolas-grekas

src/ProxyManager/ProxyGenerator/LazyLoadingGhost/MethodGenerator/SetProxyInitializer.php

@@ -4,6 +4,7 @@
 
 namespace ProxyManager\ProxyGenerator\LazyLoadingGhost\MethodGenerator;
 
+use Closure;
 use Laminas\Code\Generator\ParameterGenerator;
 use Laminas\Code\Generator\PropertyGenerator;
 use ProxyManager\Generator\MethodGenerator;
@@ -21,7 +22,7 @@ public function __construct(PropertyGenerator $initializerProperty)
     {
         parent::__construct(
             'setProxyInitializer',
-            [(new ParameterGenerator('initializer', 'Closure'))->setDefaultValue(null)],
+            [(new ParameterGenerator('initializer', Closure::class))->setDefaultValue(null)],
             self::FLAG_PUBLIC,
             '$this->' . $initializerProperty->getName() . ' = $initializer;'
         );