Backwards incompatible changes:
- Removed support for passing an Extension instance to
from_issuer_subject_key_identifier(), as per our deprecation policy.
- Support for LibreSSL 2.7.x, 2.8.x, and 2.9.0 has been removed (2.9.1+
is still supported).
- Dropped support for macOS 10.9, macOS users must upgrade to 10.10 or
newer.
- RSA generate_private_key() no longer accepts public_exponent values
except 65537 and 3 (the latter for legacy purposes).
- X.509 certificate parsing now enforces that the version field contains
a valid value, rather than deferring this check until version is
accessed.
Deprecations:
- Deprecated support for Python 2. At the time there is no time table
for actually dropping support, however we strongly encourage all users
to upgrade their Python, as Python 2 no longer receives support from
the Python core team.
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