Fixed serializer injection

[karolsojko]

I've fixed an error with injecting the serializer.

First error was that there is no CL\Slack\Util\PayloadSerializer but there is CL\Slack\Serializer\PayloadSerializer.
The second error was that CL\Slack\Serializer\PayloadSerializer is abstract so can't be instantiated and the ApiClient expects an instance of SerializerInterface from JMS so why not inject the jms_serializer. This makes the bundle actually work ;)

[cleentfaar]

@karolsojko I'm happy to merge any PR but I'm pretty sure you are dealing with an older version of the bundle/library package.

Please try running composer update. If the problem persists, tell me which commit hashes you are using for the cleentfaar/slack-bundle and cleentfaar/slack packages, so I can debug it a bit better.

The serializer you are referring to (the PayloadSerializer) is actually very much needed, as you will find upon updating. It might be that the namespacing I used was wrong at the time and that was why you were having errors.

I'm currently double-checking any bugs that I might have missed during recent refactorings by running it in a real-life project of mine, so more fixes may be coming soon.

Thanks for reporting!

[karolsojko]

Hmm I think you're right. Previously when I required in composer the bundle in dev-master it installed slack library in 0.12.1 and now it installs in 0.13.2 which is fine now. Thanks for clarifying :)