fix: update jest config

wevm/viem#1329

Author: grikomsn

jest.config.js

@@ -7,9 +7,16 @@ const createJestConfig = nextJest({
 });
 
 // Add any custom config to be passed to Jest
+/** @type {import('@jest/types').Config.InitialOptions} */
 const customJestConfig = {
+  moduleNameMapper: {
+    isows: "<rootDir>/node_modules/isows/_cjs/index.js", // https://github.com/wagmi-dev/viem/issues/1329
+  },
   setupFilesAfterEnv: ["<rootDir>/jest.setup.js"],
   testEnvironment: "jest-environment-jsdom",
+  transformIgnorePatterns: [
+    "node_modules/(?!isows/)", // https://github.com/wagmi-dev/viem/issues/1329
+  ],
   testPathIgnorePatterns: [
     "<rootDir>/.next/",
     "<rootDir>/node_modules/",