convert to typescript - react-router upgrade to 4

app/components/Navbar/Navbar.tsx

@@ -0,0 +1,38 @@
+import React from 'react';
+import { NavLink } from 'react-router-dom';
+
+import './Navbar.scss';
+
+interface Props {
+    
+}
+
+interface State {
+    
+}
+
+export default class Navbar extends React.Component<Props, State> {
+
+    constructor(props: Props) {
+        super(props);
+    }    
+
+    render() {
+        return (
+            <div className="Navbar">
+                <div className="Navbar__header">
+                    <span>React Starter</span>
+                    <a href="https://github.com/mgerb/react-webpack2-seed">GitHub
+                        <i className="fa fa-github" aria-hidden="true"/>
+                    </a>
+                </div>
+                
+                <div className="Navbar__nav">
+                    <NavLink to="/" className="Navbar__item" exact activeClassName="Navbar__item--active">Home</NavLink>
+                    <NavLink to="/new" className="Navbar__item" exact activeClassName="Navbar__item--active">New</NavLink>
+                </div>
+            </div>
+        );
+    }
+}
+