Test work

Notes

1. Material UI and dx-react-grid was used to speed up test and to show how libraries can be used
2. No backend, but filterCurrencyRatesByDate is async function, which can be replaced with backend request
3. Currencies are selected by typing with space as separator
4. No tests, but place for filtering function is marked as to do

How to start:

1. npm install
2. npm start