Migrate utils-cryptography to ethers (#4749)

Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>
Co-authored-by: ernestognw <ernestognw@gmail.com>

test/utils/cryptography/EIP712.test.js

@@ -1,4 +1,5 @@
 const { ethers } = require('hardhat');
+const { expect } = require('chai');
 const { getDomain, domainType, domainSeparator, hashTypedData } = require('../../helpers/eip712');
 const { getChainId } = require('../../helpers/chainid');
 const { mapValues } = require('../../helpers/iterate');