Update itsdangerous to 2.0.1

[pyup-bot]

This PR updates itsdangerous from 1.1.0 to 2.0.1.

Changelog

### 2.0.1 ``` ------------- Released 2021-05-18 - Mark top-level names as exported so type checking understands imports in user projects. :pr:`240` - The ``salt`` argument to ``Serializer`` and ``Signer`` can be ``None`` again. :issue:`237` ``` ### 2.0.0 ``` ------------- Released 2021-05-11 - Drop support for Python 2 and 3.5. - JWS support (``JSONWebSignatureSerializer``, ``TimedJSONWebSignatureSerializer``) is deprecated. Use a dedicated JWS/JWT library such as authlib instead. :issue:`129` - Importing ``itsdangerous.json`` is deprecated. Import Python's ``json`` module instead. :pr:`152` - Simplejson is no longer used if it is installed. To use a different library, pass it as ``Serializer(serializer=...)``. :issue:`146` - ``datetime`` values are timezone-aware with ``timezone.utc``. Code using ``TimestampSigner.unsign(return_timestamp=True)`` or ``BadTimeSignature.date_signed`` may need to change. :issue:`150` - If a signature has an age less than 0, it will raise ``SignatureExpired`` rather than appearing valid. This can happen if the timestamp offset is changed. :issue:`126` - ``BadTimeSignature.date_signed`` is always a ``datetime`` object rather than an ``int`` in some cases. :issue:`124` - Added support for key rotation. A list of keys can be passed as ``secret_key``, oldest to newest. The newest key is used for signing, all keys are tried for unsigning. :pr:`141` - Removed the default SHA-512 fallback signer from ``default_fallback_signers``. :issue:`155` - Add type information for static typing tools. :pr:`186` ```

Links

- PyPI: https://pypi.org/project/itsdangerous - Changelog: https://pyup.io/changelogs/itsdangerous/ - Homepage: https://palletsprojects.com/p/itsdangerous/

[coveralls]

Coverage remained the same at 93.687% when pulling 3cc0dbd1cec4051e42b73ad794911b173978adfb on pyup-update-itsdangerous-1.1.0-to-2.0.1 into 32b5e13998fb0bccc80e04d73303fa91722deba8 on main.

[coveralls]

Coverage remained the same at 93.687% when pulling 3cc0dbd1cec4051e42b73ad794911b173978adfb on pyup-update-itsdangerous-1.1.0-to-2.0.1 into 32b5e13998fb0bccc80e04d73303fa91722deba8 on main.