Add discovery package

[welcoMattic]

No description provided.

[sagikazarmark]

Please fix the indentation

[welcoMattic]

my bad, it's done ;)

[Nyholm]

Thank you for this PR. The discovery is needed.
Could you check the indentation?

[welcoMattic]

@Nyholm I thin client-common is needed too?

[Nyholm]

Client common is already required, right?

[welcoMattic]

In fact yes, but when I try to use Httplug::sendRequest($request);, I catch an error like:

Class 'Http\Adapter\Guzzle6\Client' not found

EDIT: I just run composer require php-http/guzzle6-adapter and magic happens ;)

[Nyholm]

Yes, composer require php-http/guzzle6-adapter is what was missing in your app.

Ill make sure to merge this PR as soon as the tests are green

[joelwurtz]

It miss "php-http/client-implementation": "^1.0" so the error of not found client will be thrown by composer and not discovery

[welcoMattic]

@joelwurtz @Nyholm done

[joelwurtz]

LGTM

[Nyholm]

Thank you !