update CHANGELOG.rst & AUTHORS.rst (#3231)
* finish https://github.com/pyca/cryptography/pull/1973
* change API & add test
Function will now return an instance of EllipticCurvePrivateKey, as that
is the users' ultimate goal anyway.
* fix test
* improve coverage
* complete coverage
* final fix
* centos fix
* try ec.SECT283K1
* try ec.SECT571K1
* try ec.SECT409K1
* try ec.SECT283K1
* try ec.SECT233K1
* try ec.SECT163K1
* try ec.SECT571R1
* try ec.SECT409R1
* try ec.SECT283R1
* try ec.SECT233R1
* try ec.SECT163R2
* try ec.SECP521R1
* try ec.SECP256R1
* retry
* cleanup asserts
* use openssl_assert
* skip unsupported platforms
* change API name to derive_private_key
* change version added
* improve description of `secret` param
* separate successful and failure test cases
* simplify successful case
* add docs for derive_elliptic_curve_public_point
* add period
* update CHANGELOG.rst & AUTHORS.rst
for https://github.com/pyca/cryptography/pull/3225
* added reST prefix
* reduce line length
2 files changed