Libcoveocds

Added

- Allow execution of command-line interface using `python -m libcoveocds`.

Changed

- Drop support for Python 3.6.

Fixed

- Add support for Bleach 6.

Fixed

- Extract the description of the `ocid` field in all languages.
- Label an extension as invalid if the extension metadata URL is empty or the release schema patch is not valid JSON.

Changed

- Check the combination of `ocid` and `id` is unique in releases, instead of just `id` https://github.com/open-contracting/cove-ocds/issues/127

Fixed

- Add a `record_pkg` keyword argument to the `ocds_json_output` function. Since 0.8.0 ([44](https://github.com/open-contracting/lib-cove-ocds/pull/44)), the `ocds_json_output` function would check record packages against the release package schema.

Added

- Add Python wheels distribution.

Changed

- `common_checks_ocds` returns more fields on each error dictionary, so that we can [replace the message with a translation in cove-ocds](https://github.com/open-contracting/cove-ocds/pull/149)
- Update the default config to use branch urls instead of tag urls for the schema. This means patch fixes will automatically be pulled in.

Fixed

- libcoveocds commandline fails for record packages https://github.com/open-contracting/lib-cove-ocds/issues/39