Scheduled daily dependency update on tuesday

[pyup-bot]

Update cryptography from 2.2.2 to 2.3.

Changelog

### 2.3 ``` ~~~~~~~~~~~~~~~~ * **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: ```

Links

- PyPI: https://pypi.org/project/cryptography - Changelog: https://pyup.io/changelogs/cryptography/ - Repo: https://github.com/pyca/cryptography

[codecov-io]

Codecov Report

Merging #1277 into master will decrease coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1277      +/-   ##
==========================================
- Coverage     100%   99.98%   -0.02%     
==========================================
  Files          59       59              
  Lines        9531     9531              
==========================================
- Hits         9531     9530       -1     
- Misses          0        1       +1

Impacted Files	Coverage Δ
autopush/tests/test_z_main.py	99.6% <0%> (-0.4%)	:arrow_down:

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[pyup-bot]

Closing this in favor of #1278