Gitlab.edit_project_approvers 404 Not Found

[JianweiWangs]

# Change allowed approvers and approver groups for a project
    #
    # @example
    #    Gitlab.edit_project_approvers(1, {approver_ids: [5], approver_groups: [1]})
    #
    # @param [Integer] project(required) The ID of a project.
    # @option options [Array] :approver_ids(optional) An array of User IDs that can approve MRs
    # @option options [Array] :approver_group_ids(optional) An array of Group IDs whose members can approve MRs
    # @return [Gitlab::ObjectifiedHash] MR approval configuration information about the project
    def edit_project_approvers(project, options = {})
      put("/projects/#{url_encode project}/approvals", body: options)
    end

approvals is typo, from Merge request approvals API, it should be approvers, I will fix it soon

[JianweiWangs]

#489