Completed initial set up, also edited the name and settings of the app. Checkpoint 1.

simon-says/src/testing/mockRedux.js

+jest.mock('react-redux', () => ({
+  useSelector: jest.fn((selector) => {
+    if (selector.mock === undefined) {
+      throw new Error(`Call to unmocked selector ${selector.name}`);
+    }
+    return selector();
+  }).mockName('useSelector'),
+  useDispatch: jest.fn(() => () => {}).mockName('useDispatch'),
+}));