Jsonschema

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* Added ``create`` and ``extend`` to ``jsonschema.validators``
* Removed ``ValidatorMixin``
* Fixed array indices ref resolution (95)
* Fixed unknown scheme defragmenting and handling (102)

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* Better error tracebacks (83)
* Raise exceptions in ``ErrorTree``\s for keys not in the instance (92)
* __cause__ (93)

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* More attributes for ValidationError (86)
* Added ``ValidatorMixin.descend``
* Fixed bad ``RefResolutionError`` message (82)

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* Canonicalize URIs (70)
* Allow attaching exceptions to ``format`` errors (77)

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* Support for Draft 4
* Support for format
* Longs are ints too!
* Fixed a number of issues with ``$ref`` support (66)
* Draft4Validator is now the default
* ``ValidationError.path`` is now in sequential order
* Added ``ValidatorMixin``

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- Update vendored schemas: bitbucket-pipelines, circle-ci, readthedocs,
renovate (2024-06-23)
- Add CircleCI schema and pre-commit hook. Thanks :user:`jrdnbradford`! (:pr:`444`)