Bump gds-api-adapters to 14.0.0

From now on, content will be published to the Publishing API, and
read from the Content Store. All the naming and adapters have been
updated to reflect this split.
Merge pull request #36 from alphagov/bump-gds-api-adapters-to-pick-up-publishing-api

Bump gds-api-adapters to 14.0.0