UPGRADE FROM 3.2 to 3.3
=======================
ClassLoader
-----------
* The ApcClassLoader, WinCacheClassLoader and XcacheClassLoader classes have been deprecated
in favor of the `--apcu-autoloader` option introduced in composer 1.3
DependencyInjection
-------------------
* Using the `PhpDumper` with an uncompiled `ContainerBuilder` is deprecated and
will not be supported anymore in 4.0.
* The `DefinitionDecorator` class is deprecated and will be removed in 4.0, use
the `ChildDefinition` class instead.
Finder
------
* The `ExceptionInterface` has been deprecated and will be removed in 4.0.
HttpKernel
* The `Psr6CacheClearer::addPool()` method has been deprecated. Pass an array of pools indexed
by name to the constructor instead.
Security
--------
* The `RoleInterface` has been deprecated. Extend the `Symfony\Component\Security\Core\Role\Role`
class in your custom role implementations instead.
SecurityBundle
--------------
* The `FirewallContext::getContext()` method has been deprecated and will be removed in 4.0.
Use the `getListeners()` method instead.