Fix delete discussion API

Add the bot flag to the User class

Fix #744 Added missing name attribute to Badges class

fix: added missing boolean

Added missing name attribute to Badges class. Also aligned indent of Badges class with rest of api.model package

https://docs.gitlab.com/ee/api/discussions.html#delete-a-merge-request-thread-note

added squashOption to Project

Updating System Hook tests with commentary

Ensuring test SystemHooks are removed if tests fail, adding commentary/todo to address GitLab issue at future date

Fix #645 : Add pipeline_id in POST CommitStatus

Fix #656 : Re-support project issues statistics

#665 - [Feature Request] Get PGP keys in user API

Move markdown call to post with serialized JSON payload

Fix #708 : fix typo in create_access_level key

Fix #621 : Add deployment API

Fix #626 : Add missing properties to Branch model

Fix #649 : Add missing properties to SystemHook

Update hook project wiki event wqattribute to wiki_page_events

In GitLab 11.11, the Project Hook Key for wiki events was wiki_events.
We don't support GitLab 11.X. We only support GitLab 12.9.2+.
In new version of GitLab the correct key is wiki_page_events.

Remove unnecessary Memberships class from the project