updated jest to sort of work with es6

tests/jest.config.js

@@ -0,0 +1,11 @@
+/** @type {import('jest').Config} */
+const config = {
+    clearMocks: true,
+    collectCoverage: true,
+    coverageDirectory: "coverage",
+    setupFiles: ["<rootDir>/jest.setup.js"], // path to a setup module to configure the testing environment before each test
+    transform: {},
+    verbose: true,
+};
+
+export default config;