Fix unit tests (#248)

* Fix tests

- Remove jest tests and add coverage

- Rebase master and fix tests

* Ignore local .vscode

Add clean script

* Fix deps

- Upgrade deps
- Switch to esnext

* Move tests to the right folder

* Deps cleanup and bump up

* Remove root level package.json

* Fix grumbles

* Remove the labeler action due to https://github.com/actions/labeler/issues/12

* Fix grumbles

frontend/test/App.test.tsx

@@ -0,0 +1,9 @@
+import * as React from 'react';
+import * as ReactDOM from 'react-dom';
+import App from './App';
+
+it('renders without crashing', () => {
+  const div = document.createElement('div');
+  ReactDOM.render(<App />, div);
+  ReactDOM.unmountComponentAtNode(div);
+});