Libcove

Changed

- Change uniqueItems error messages, to remove Python repr blocks [cove1220](https://github.com/OpenDataServices/cove/issues/1220)

Added

- Return specific validation errors for `oneOf` in OCDS records, by using the presence/absence of `id` to assume embedded/linked releases sub-schema. Only works for OCDS records. [cove895](https://github.com/OpenDataServices/cove/issues/895)
- Add an `assumption` key to the validation JSON, to flag when one of the above assumptions has been made. [cove895](https://github.com/OpenDataServices/cove/issues/895)
- Add an `error_id` key to the validation JSON, a machine readable ID for the error. Currently only implemented for 1 error. [31](https://github.com/OpenDataServices/lib-cove/pull/31#issuecomment-538868533)

Changed

- Remove restriction on jsonschema version ([commit](https://github.com/OpenDataServices/lib-cove/pull/31/commits/f23fdd332c97903e21e478146bd490898efe3995))

Changed

- Allow the passing of `root_id` to the conversion tool

Changed

- Allow the passing of `root_list_path` to the conversion tool

Changed

- OCDS is now available on SSL. Updated comments and tests (but no code).
- Improve CustomJsonrefLoader; make `schema_url` a required parameter.
- Improve UI for validation errors on array items.
- More tests.

Added

- Add new additional fields section to context which list all additional fields. It also states which are top level additional fields with all their descendants.