Release 1.30.0

The following changes have been made in this release:

• Return 400 error if non numeric version in request
• Paginate GET /instances/{instance_id}/dimensions and GET /instances/{instance_id}/dimensions/{dimension}/options: https://trello.com/c/yOURvD7U/5128-add-pagination-to-endpoints-in-dp-dataset-api
• Utilise httptest in tests
• Replace audit exclude tag with .nancy-ignore file for jwt-go exception
• Add lint CI job