Improve Cliq integration with Gitlab

Improve Cliq integration with Gitlab

Developers,

Please, consider improving the integration between Cliq and Gitlab.

This extension needs to improved.

The main features that a team needs with this extension are related to updates in Merge Requests.
But it doesn't send a message when a Merge Request has been approved, or when it has been merged, these are fundamental warnings.

Instead, when a Merge Request is merged, this extension sends a message that the branch has been deleted, irrelevant information close to what would actually be needed: That the MR was approved, reject, closed or merged (and by whom).

Developers, please consider improving the update messages in Merge Requests.