Bump cryptography from 2.1.4 to 2.3

[dependabot]

Bumps cryptography from 2.1.4 to 2.3.

Changelog

Sourced from cryptography's changelog.

2.3 - 2018-07-18

* **SECURITY ISSUE:**
  :meth:`~cryptography.hazmat.primitives.ciphers.AEADDecryptionContext.finalize_with_tag`
  allowed tag truncation by default which can allow tag forgery in some cases.
  The method now enforces the ``min_tag_length`` provided to the
  :class:`~cryptography.hazmat.primitives.ciphers.modes.GCM` constructor.
  *CVE-2018-10903*
* Added support for Python 3.7.
* Added :meth:`~cryptography.fernet.Fernet.extract_timestamp` to get the
  authenticated timestamp of a :doc:`Fernet </fernet>` token.
* Support for Python 2.7.x without ``hmac.compare_digest`` has been deprecated.
  We will require Python 2.7.7 or higher (or 2.7.6 on Ubuntu) in the next
  ``cryptography`` release.
* Fixed multiple issues preventing ``cryptography`` from compiling against
  LibreSSL 2.7.x.
* Added
  :class:`~cryptography.x509.CertificateRevocationList.get_revoked_certificate_by_serial_number`
  for quick serial number searches in CRLs.
* The :class:`~cryptography.x509.RelativeDistinguishedName` class now
  preserves the order of attributes. Duplicate attributes now raise an error
  instead of silently discarding duplicates.
* :func:`~cryptography.hazmat.primitives.keywrap.aes_key_unwrap` and
  :func:`~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding`
  now raise :class:`~cryptography.hazmat.primitives.keywrap.InvalidUnwrap` if
  the wrapped key is an invalid length, instead of ``ValueError``.
.. _v2-2-2:
2.2.2 - 2018-03-27

• Updated Windows, macOS, and manylinux1 wheels to be compiled with OpenSSL 1.1.0h.

.. _v2-2-1:

2.2.1 - 2018-03-20

* Reverted a change to ``GeneralNames`` which prohibited having zero elements,
  due to breakages.
* Fixed a bug in
  :func:`~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding`
  that caused it to raise ``InvalidUnwrap`` when key length modulo 8 was
  zero.
.. _v2-2:
</tr></table> ... (truncated)

Commits

• 0a846e2 bump version and changelog for 2.3 release (#4356)
• feb1345 Refs #3331 -- integrated wycheproof ECDH tests (#4354)
• dfb332d improve skip msg when skipping an ECDH test in test_ec (#4355)
• 4de0049 add wycheproof gcm tests (#4349)
• c563b57 min_tag_length is an int (#4351)
• db62ec9 also check iv length for GCM nonce in AEAD (#4350)
• 12a1cac raise ValueError on zero length GCM IV (#4348)
• 7ca0e46 add chacha20poly1305 wycheproof tests (#4345)
• 14faf3c add wycheproof tests for AES CMAC (#4344)
• d4378e4 disallow implicit tag truncation with finalize_with_tag (#4342)
• Additional commits viewable in compare view

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