EIP712 hashstruct/encodedata need to keccak256 hash strings

[abarmat]

To match the EIP712 example provided, the RFC and the way it's implemented in the DisputeManager, the name and version need to be hashed as they are strings.

Location:

common-ts/packages/common-ts/src/attestations/eip712.ts

Line 47 in 1cb3a02

[domain.name, domain.version, domain.chainId, domain.verifyingContract, domain.salt],

Reference:

• https://github.com/ethereum/EIPs/blob/master/assets/eip-712/Example.sol#L47
• In https://eips.ethereum.org/EIPS/eip-712 -> "The dynamic values bytes and string are encoded as a keccak256 hash of their contents."