Add text documenting that v5 of the API will be GraphQL

assigned to @DouweM

approved this merge request

merged

mentioned in commit a982a453

GraphQL is versioned by default. I think we should introduce it besides the REST API. v5 of the REST API should use GraphQL, it is not the same as GraphQL.

@sytses Thanks, I added gitlab-org/gitlab-ce!12030.

@stanhu is there a corresponding issue with a discussion about it? Is GraphQL API something that our users / customers commonly requested?

@adamniedzielski See https://gitlab.com/gitlab-org/gitlab-ce/issues/22753 and https://gitlab.com/gitlab-org/gitlab-ce/issues/32046.