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* Partial support for Draft 2020-12 (as well as 2019-09).
Thanks to Thomas Schmidt and Harald Nezbeda.
* ``False`` and ``0`` are now properly considered non-equal even
recursively within a container (686). As part of this change,
``uniqueItems`` validation may be *slower* in some cases. Please feel
free to report any significant performance regressions, though in
some cases they may be difficult to address given the specification
requirement.
* The CLI has been improved, and in particular now supports a ``--output``
option (with ``plain`` (default) or ``pretty`` arguments) to control the
output format. Future work may add additional machine-parsable output
formats.
* Code surrounding ``DEFAULT_TYPES`` and the legacy mechanism for
specifying types to validators have been removed, as per the deprecation
policy. Validators should use the ``TypeChecker`` object to customize
the set of Python types corresponding to JSON Schema types.
* Validation errors now have a ``json_path`` attribute, describing their
location in JSON path format
* Support for the IP address and domain name formats has been improved
* Support for Python 2 and 3.6 has been dropped, with ``python_requires``
properly set.
* ``multipleOf`` could overflow when given sufficiently large numbers. Now,
when an overflow occurs, ``jsonschema`` will fall back to using fraction
division (746).
* ``jsonschema.__version__``, ``jsonschema.validators.validators``,
``jsonschema.validators.meta_schemas`` and
``jsonschema.RefResolver.in_scope`` have been deprecated, as has
passing a second-argument schema to ``Validator.iter_errors`` and
``Validator.is_valid``.