fixes https://github.com/TryGhost/Team/issues/2611
The old email flow is no longer used since we introduced the email stability flow. This commit removes the related code and tests. The general test coverage decreased a bit as a result, because the old email flow probably had a high test coverage. The new flow is in separate packages, so it couldn't contribute to a higher test coverage (but it does have 100% unit test coverage).
Refs TryGhost/Team#2459
-upgraded got from v9.6.0 to v11.8.6 to support following redirects (and
other fixes)
-got v12+ requires ESM, so we do not want to upgrade further at this
time
-required changes to a few libraries that use externalRequests
-mention discovery service tests updated to test for follow redirects
refs TryGhost/Team#2477
-removed post.edited as it was too inclusive
-changed to post.published, post.published.edited, post.unpublished
-blocked import and internal data from triggering mentions
This is a pretty simple way for us to track which webmentions are sent
by Ghost. Although it's easily spoofed, so are other approaches like
using a header (e.g. User-Agent). If we find that this data is being
spoofed we can look at different approach.
Becuase our receiving implementation stores the payload of the
Webmention, we'll be able to know inside Ghost which Mentions
originated from another Ghost installation, which is useful for stats
and gives us the possibility to display that information in the feed.
Longer term we might want to consider storing this data in a separate
column for Mentions, rather than the `payload` column - but that is
outside the scope of this change.
