Log Message:
py-ecdsa: updated to 0.18.0

Release 0.18.0 (09 Jul 2022)

New API:
* `curve_by_name` in `curves` module to get a `Curve` object by providing curve
  name.

Bug fix:
* Make the `VerifyingKey` encoded with explicit parameters use the same
  kind of point encoding for public key and curve generator.
* Better handling of malformed curve parameters (as in CVE-2022-0778);
  make python-ecdsa raise `MalformedPointError` instead of `AssertionError`.

Doc fix:
* Publish the documentation on https://ecdsa.readthedocs.io/,
  include explanation of basics of handling of ECC data formats and how to use
  the library for elliptic curve arithmetic.
* Make object names more consistent, make them into hyperlinks on the
  readthedocs documentation.
* Make security note more explicit (Ian Rodney)
* Fix the `explicit` vs `named_curve` confusion in `VerifyingKey` docs.

Maintenance:
* Updated black version; slight changes to formatting
* Include interoperability tests for Ed25519 and Ed448 with OpenSSL.