Remove pysha3 as an option

[carver]

pysha3 is no longer maintained: tiran/pysha3#17 (comment)

Remove it as an option. Use hashlib as the default option if neither pycryptodome nor pysha3 are installed

Requires a major version bump. Maybe it's time to go to v1?

[kclowes]

Unfortunately, hashlib doesn't have keccak implemented at this point.

[kclowes]

So we may just have to have pycryptodome be the backend? Do you see any other options @carver?

[carver]

So we may just have to have pycryptodome be the backend? Do you see any other options @carver?

Oof, not really, besides importing the source of pysha3 and taking over maintenance, which is probably not realistic :/

[Uxio0]

You can use: https://pypi.org/project/safe-pysha3/ . I updated the breaking C code, so now it's not compatible with Python < 3.9 , but we can use previous pysha3 version for that

[kclowes]

Closed via #45. Thanks @Uxio0!