Add Collection release dates to the official API

[GregSutcliffe]

Feature Request

Use Case

Adding the release timestamps to the Galaxy API. This is currently visible in the UI, but not in the API.

Proposed Solution

Currently the API looks like:

URL: https://galaxy.ansible.com/api/v2/collections/community/grafana/versions/
    "results": [
        {
            "version": "1.0.0",
            "href": "https://galaxy.ansible.com/api/v2/collections/community/grafana/versions/1.0.0/"
        },
...

It would be great to have the release date in there too, eg

                    "created": "2020-08-16T05:18:29.873694-04:00",

Alternatives

This data is already available via the internal API used by the UI, e.g.:

URL: https://galaxy.ansible.com/api/internal/ui/repo-or-collection-detail/?namespace=community&name=grafana
            "all_versions": [
                {
                    "pk": 3485,
                    "version": "1.0.0",
                    "quality_score": null,
                    "created": "2020-08-16T05:18:29.873694-04:00",
                    "modified": "2020-08-16T05:18:29.873716-04:00",
                    "download_url": "/download/community-grafana-1.0.0.tar.gz"
                },
...

However, relying on internal APIs for external tooling is generally bad form, hence this request.

Implementation

As per the Proposed Solution, adding "created" and also "modified" would be perfect.