v4.0.1

Update homepage, repository and readme in Cargo.toml

SIEVE IR v2.1.0

Compared to SIEVE IR specification v2.1.0, our implementation is slightly different

• Extension fields and rings are not included.
• Only the modulus mode is included for the convert gate.

SIEVE IR v1.0.1

zkinterface-ir version compliant with the SIEVE IR specifications v1.0.1.