Update cryptography to 2.1.4

[pyup-bot]

There's a new version of cryptography available.
You are currently using 1.9. I have updated it to 2.1.4

These links might come in handy: PyPI | Changelog | Repo

Changelog

2.1.3

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

.. _v2-1-2:

2.1.2

• Corrected a bug with the manylinux1 wheels where OpenSSL's stack was
  marked executable.

.. _v2-1-1:

2.1.1

• Fixed support for install with the system pip on Ubuntu 16.04.

.. _v2-1:

2.1

• FINAL DEPRECATION Python 2.6 support is deprecated, and will be removed
  in the next release of cryptography.
• BACKWARDS INCOMPATIBLE: Whirlpool, RIPEMD160, and
  UnsupportedExtension have been removed in accordance with our
  :doc:/api-stability policy.
• BACKWARDS INCOMPATIBLE:
  :attr:DNSName.value <cryptography.x509.DNSName.value>,
  :attr:RFC822Name.value <cryptography.x509.RFC822Name.value>, and
  :attr:UniformResourceIdentifier.value <cryptography.x509.UniformResourceIdentifier.value>
  will now return an :term:A-label string when parsing a certificate
  containing an internationalized domain name (IDN) or if the caller passed
  a :term:U-label to the constructor. See below for additional deprecations
  related to this change.
• Installing cryptography now requires pip 6 or newer.
• Deprecated passing :term:U-label strings to the
  :class:~cryptography.x509.DNSName,
  :class:~cryptography.x509.UniformResourceIdentifier, and
  :class:~cryptography.x509.RFC822Name constructors. Instead, users should
  pass values as :term:A-label strings with idna encoding if necessary.
  This change will not affect anyone who is not processing internationalized
  domains.
• Added support for
  :class:~cryptography.hazmat.primitives.ciphers.algorithms.ChaCha20. In
  most cases users should choose
  :class:~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305
  rather than using this unauthenticated form.
• Added :meth:~cryptography.x509.CertificateRevocationList.is_signature_valid
  to :class:~cryptography.x509.CertificateRevocationList.
• Support :class:~cryptography.hazmat.primitives.hashes.BLAKE2b and
  :class:~cryptography.hazmat.primitives.hashes.BLAKE2s with
  :class:~cryptography.hazmat.primitives.hmac.HMAC.
• Added support for
  :class:~cryptography.hazmat.primitives.ciphers.modes.XTS mode for
  AES.
• Added support for using labels with
  :class:~cryptography.hazmat.primitives.asymmetric.padding.OAEP when using
  OpenSSL 1.0.2 or greater.
• Improved compatibility with NSS when issuing certificates from an issuer
  that has a subject with non-UTF8String string types.
• Add support for the :class:~cryptography.x509.DeltaCRLIndicator extension.
• Add support for the :class:~cryptography.x509.TLSFeature
  extension. This is commonly used for enabling OCSP Must-Staple in
  certificates.
• Add support for the :class:~cryptography.x509.FreshestCRL extension.

.. _v2-0-3:

2.0.3

• Fixed an issue with weak linking symbols when compiling on macOS
  versions older than 10.12.

.. _v2-0-2:

2.0.2

• Marked all symbols as hidden in the manylinux1 wheel to avoid a
  bug with symbol resolution in certain scenarios.

.. _v2-0-1:

2.0.1

• Fixed a compilation bug affecting OpenBSD.
• Altered the manylinux1 wheels to statically link OpenSSL instead of
  dynamically linking and bundling the shared object. This should resolve
  crashes seen when using uwsgi or other binaries that link against
  OpenSSL independently.
• Fixed the stack level for the signer and verifier warnings.

.. _v2-0:

2.0

• BACKWARDS INCOMPATIBLE: Support for Python 3.3 has been dropped.
• We now ship manylinux1 wheels linked against OpenSSL 1.1.0f. These wheels
  will be automatically used with most Linux distributions if you are running
  the latest pip.
• Deprecated the use of signer on
  :class:~cryptography.hazmat.primitives.asymmetric.rsa.RSAPrivateKey,
  :class:~cryptography.hazmat.primitives.asymmetric.dsa.DSAPrivateKey,
  and
  :class:~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePrivateKey
  in favor of sign.
• Deprecated the use of verifier on
  :class:~cryptography.hazmat.primitives.asymmetric.rsa.RSAPublicKey,
  :class:~cryptography.hazmat.primitives.asymmetric.dsa.DSAPublicKey,
  and
  :class:~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey
  in favor of verify.
• Added support for parsing
  :class:~cryptography.x509.certificate_transparency.SignedCertificateTimestamp
  objects from X.509 certificate extensions.
• Added support for
  :class:~cryptography.hazmat.primitives.ciphers.aead.ChaCha20Poly1305.
• Added support for
  :class:~cryptography.hazmat.primitives.ciphers.aead.AESCCM.
• Added
  :class:~cryptography.hazmat.primitives.ciphers.aead.AESGCM, a "one shot"
  API for AES GCM encryption.
• Added support for :doc:/hazmat/primitives/asymmetric/x25519.
• Added support for serializing and deserializing Diffie-Hellman parameters
  with
  :func:~cryptography.hazmat.primitives.serialization.load_pem_parameters,
  :func:~cryptography.hazmat.primitives.serialization.load_der_parameters,
  and
  :meth:~cryptography.hazmat.primitives.asymmetric.dh.DHParameters.parameter_bytes
  .
• The extensions attribute on :class:~cryptography.x509.Certificate,
  :class:~cryptography.x509.CertificateSigningRequest,
  :class:~cryptography.x509.CertificateRevocationList, and
  :class:~cryptography.x509.RevokedCertificate now caches the computed
  Extensions object. There should be no performance change, just a
  performance improvement for programs accessing the extensions attribute
  multiple times.

.. _v1-9:

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[pyup-bot]

Closing this in favor of #21