Add EIP-712 type exports (#221).

Author: ricmoo

packages/ethers/src.ts/ethers.ts

@@ -21,6 +21,7 @@ import { ErrorCode as errors, Logger } from "@ethersproject/logger";
 ////////////////////////
 // Types
 
+import type { TypedDataDomain, TypedDataField } from "@ethersproject/abstract-signer";
 import { BigNumberish } from "@ethersproject/bignumber";
 import { Bytes, BytesLike, Signature } from "@ethersproject/bytes";
 import { Transaction, UnsignedTransaction } from "@ethersproject/transactions";
@@ -107,6 +108,9 @@ export {
 
     ContractInterface,
 
+    TypedDataDomain,
+    TypedDataField,
+
     BigNumberish,
 
     Bytes,