Signed-off-by: Jeffery To <jeffery.to@gmail.com>

From the README:

attrs is an MIT-licensed Python package with class decorators that ease
the chores of implementing the most common attribute-related object
protocols.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

From the package description:

Python wrapper module around the OpenSSL library

This depends on python-cryptography (#2035)

Signed-off-by: Jeffery To <jeffery.to@gmail.com>