React Router - I

Setup:

npm install

or 

yarn

Create a Navbar Component with the following Links

Page content - route
Home Page - `/` 
Contact Page - `/contact` 
About Page - `/about-us` 
Services Page - `/services` 
Login Page - `/login` 

When you click on these links, you should display different the corresponding components.

Run tests, and clear all tests:

npm run test