[EventDispatcher] Fix position of AddEventAliasesPass

[fsoedjede]

In the note following the change, it's written : Note that AddEventAliasesPass has to be processed before RegisterListenersPass.
But in the code it was the inverse

[wouterj]

Did you experience this while using the code? Because I think the code is correct:

• The order of processing is important, the order of registration is not.
• The RegisterListenerPass is registered as PassConfig::TYPE_BEFORE_REMOVING, the AddEventAliasesPass class defaults to PassConfig::TYPE_BEFORE_OPTIMIZATION.
• The order of processing of the container is: before optimization, optimization, after optimization, before removing, removing, after removing so the processing occurs in the correct order.

Anyway, I don't see much problem with changing the order in the example if that's more clear :)

[javiereguiluz]

Thank you Felix.

[fsoedjede]

@wouterj You're right. It could have stayed as is. I didn't give enough attention to PassConfig::TYPE_BEFORE_REMOVING

Thanks for accepting!