Description of the problem, including code/CLI snippet

Since GitLab 12.3, gitlab changed API for MR approvals
https://docs.gitlab.com/ee/api/merge_request_approvals.html
project.approvals.get() --> cannot get list approvals
<class 'gitlab.v4.objects.ProjectApproval'> => {'approvers': [], 'approver_groups': [], 'approvals_before_merge': 2, 'reset_approvals_on_push': True, 'disable_overriding_approvers_per_merge_request': True, 'merge_requests_author_approval': False, 'merge_requests_disable_committers_approval': False}

Expected Behavior

• Integration to this new API for MR approvals: get list approvals, add/remove approvals

Actual Behavior

• Update API for MR approvals

Specifications

• python-gitlab version: 1.11
• API version you are using (v3/v4): v4
• Gitlab server version (or gitlab.com): 12.3