Bump the SDK version to follow the controller refactor

[dbengsch]

Bump SDK version to 2.3.0 after the merge of the PR kuzzleio/kuzzle#569.

See kuzzleio/sdk-javascript#152 for more details.

[ballinette]

should be 2.3.4 after the merge of kuzzleio/sdk-javascript#165

[ballinette]

and need also to fix userAuthorization service with new contoller/action names