Update symfony/event-dispatcher requirement from ~4.4 to ~5.4 in /build/integration

[dependabot]

Updates the requirements on symfony/event-dispatcher to permit the latest version.

Release notes

Sourced from symfony/event-dispatcher's releases.

v5.4.0

Changelog (symfony/event-dispatcher@v5.4.0-RC1...v5.4.0)

• no significant changes

Changelog

Sourced from symfony/event-dispatcher's changelog.

CHANGELOG

5.4

• Allow #[AsEventListener] attribute on methods

5.3

• Add #[AsEventListener] attribute for declaring listeners on PHP 8

5.1.0

• The LegacyEventDispatcherProxy class has been deprecated.
• Added an optional dispatcher attribute to the listener and subscriber tags in RegisterListenerPass.

5.0.0

• The signature of the EventDispatcherInterface::dispatch() method has been changed to dispatch($event, string $eventName = null): object.
• The Event class has been removed in favor of Symfony\Contracts\EventDispatcher\Event.
• The TraceableEventDispatcherInterface has been removed.
• The WrappedListener class is now final.

4.4.0

• AddEventAliasesPass has been added, allowing applications and bundles to extend the event alias mapping used by RegisterListenersPass.
• Made the event attribute of the kernel.event_listener tag optional for FQCN events.

4.3.0

• The signature of the EventDispatcherInterface::dispatch() method should be updated to dispatch($event, string $eventName = null), not doing so is deprecated
• deprecated the Event class, use Symfony\Contracts\EventDispatcher\Event instead

4.1.0

• added support for invokable event listeners tagged with kernel.event_listener by default
• The TraceableEventDispatcher::getOrphanedEvents() method has been added.
• The TraceableEventDispatcherInterface has been deprecated.

4.0.0

• removed the ContainerAwareEventDispatcher class

... (truncated)

Commits

• 27d39ae Allow v3 contracts where possible
• 9748a8d Merge branch '5.3' into 5.4
• 661a7a6 Merge branch '4.4' into 5.3
• 1a024b4 Never rely on dynamic properties
• 9c8d699 Fix more generic types
• 39b14b5 Add generic types to traversable implementations
• ac2f062 [DependencyInjection] Autoconfigurable attributes on methods, properties and ...
• e442d4a [EventDispatcher] fix @return type on EventSubscriberInterface
• 3de2cac Cleanup more @return annotations
• d63cd06 Merge branch '5.3' into 5.4
• Additional commits viewable in compare view

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The following labels could not be found: 3. to review, feature: dependencies.