- update to 39.0.0:
  * **BACKWARDS INCOMPATIBLE:** Support for OpenSSL 1.1.0 has been removed.
  Users on older version of OpenSSL will need to upgrade.
  * **BACKWARDS INCOMPATIBLE:** Dropped support for LibreSSL < 3.5. The new
  minimum LibreSSL version is 3.5.0. Going forward our policy is to support
  versions of LibreSSL that are available in versions of OpenBSD that are
  still receiving security support.
  * **BACKWARDS INCOMPATIBLE:** Removed the ``encode_point`` and
  ``from_encoded_point`` methods on
  :class:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicNumbers`,
  which had been deprecated for several years.
  :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.public_bytes`
  and
  :meth:`~cryptography.hazmat.primitives.asymmetric.ec.EllipticCurvePublicKey.from_encoded_point`
  should be used instead.
  * **BACKWARDS INCOMPATIBLE:** Support for using MD5 or SHA1 in
  :class:`~cryptography.x509.CertificateBuilder`, other X.509 builders, and
  PKCS7 has been removed.
  * **ANNOUNCEMENT:** The next version of ``cryptography`` (40.0) will
    change
  the way we link OpenSSL. This will only impact users who build
  ``cryptography`` from source (i.e., not from a ``wheel``), and specify their
  own version of OpenSSL. For those users, the ``CFLAGS``, ``LDFLAGS``,
  ``INCLUDE``, ``LIB``, and ``CRYPTOGRAPHY_SUPPRESS_LINK_FLAGS`` environment
  variables will no longer be respected. Instead, users will need to
  configure their builds `as documented here`_.
  * Added support for disabling the legacy provider in OpenSSL 3.0.x
  * Added support for disabling RSA key validation checks when loading RSA
  keys via
  ~cryptography.hazmat.primitives.serialization.load_pem_private_key

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