Added waffle dependencies

hardhat.config.js

@@ -6,6 +6,8 @@ require("@nomiclabs/hardhat-ethers");
 require("dotenv").config();
 require("./tasks/block-number");
 require("hardhat-gas-reporter");
+require("solidity-coverage");
+require("ethereum-waffle");
 
 const RPC_URL_SEPOLIA = process.env.SEPOLIA_RPC_URL || "https://eth-sepolia";
 const PRIVATE_KEY_SEPOLIA = process.env.SEPOLIA_PRIVATE_KEY || "0xkey";
@@ -60,6 +62,7 @@ module.exports = {
         outputFile: "gas-report.txt",
         noColors: true,
     },
+    plugins: ["@nomiclabs/hardhat-waffle"],
 };
 
 task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {