v3: upgrade to ethers v6 (#435)

* update package.json version to v3
upgrade hardhat to v6
remove multicall dependency

* dep upgrades, fixes

* progress

* more progress

* progress

* progress

* progress

* move sinon types to devdep

* update package.json

* updates

* simplify

* fixes

* progress

* fix

* fix compile warnings

* try to fix ci error

* fix ci

* fix package.json lint

.nvmrc

@@ -1 +1 @@
-18.19.0
+20.10.0

README.md

@@ -46,7 +46,7 @@ Instantiate your instance of seaport using your ethers provider:
 import { Seaport } from "@opensea/seaport-js";
 import { ethers } from "ethers";
 
-const provider = new ethers.providers.Web3Provider(window.ethereum);
+const provider = new ethers.BrowserProvider(window.ethereum);
 
 const seaport = new Seaport(provider);
 ```
@@ -57,7 +57,7 @@ const seaport = new Seaport(provider);
 import { Seaport } from "@opensea/seaport-js";
 import { ethers } from "ethers";
 
-const provider = new ethers.providers.JsonRpcProvider(
+const provider = new ethers.JsonRpcProvider(
   "https://<network>.alchemyapi.io/v2/YOUR-API-KEY",
 );
 
@@ -71,7 +71,7 @@ import { Seaport } from "@opensea/seaport-js";
 import { ethers } from "ethers";
 
 // Provider must be provided to the signer when supplying a custom signer
-const provider = new ethers.providers.JsonRpcProvider(
+const provider = new ethers.JsonRpcProvider(
   "https://<network>.alchemyapi.io/v2/YOUR-API-KEY",
 );
 
@@ -104,7 +104,7 @@ const { executeAllActions } = await seaport.createOrder(
     ],
     consideration: [
       {
-        amount: ethers.utils.parseEther("10").toString(),
+        amount: ethers.parseEther("10").toString(),
         recipient: offerer,
       },
     ],
@@ -154,7 +154,7 @@ const order = await executeAllActions();
 const { executeAllActions: executeAllFulfillActions } =
   await seaport.fulfillOrder({
     order,
-    accountAddress: fulfiller.address,
+    accountAddress: fulfiller,
   });
 
 const transaction = executeAllFulfillActions();

hardhat.config.ts

@@ -1,10 +1,7 @@
 import * as dotenv from "dotenv";
-
 import { HardhatUserConfig } from "hardhat/config";
+import "@nomicfoundation/hardhat-toolbox";
 import "@typechain/hardhat";
-import "@nomiclabs/hardhat-ethers";
-import "@nomiclabs/hardhat-waffle";
-import "solidity-coverage";
 
 dotenv.config();
 
@@ -40,7 +37,7 @@ const config: HardhatUserConfig = {
   },
   typechain: {
     outDir: "src/typechain-types",
-    target: "ethers-v5",
+    target: "ethers-v6",
   },
   paths: {
     tests: "test",