Update README.md

Author: JoBerkner

README.md

@@ -4,6 +4,10 @@ This repository is an interactive data dashboard for mobile apps using
 
 - [D3.js](https://github.com/d3/d3)
 - [React Native](https://github.com/facebook/react-native)
+- [Expo](https://github.com/expo/expo)
+- [react-native-svg](https://github.com/react-native-community/react-native-svg)
+- [topojson-client](https://github.com/topojson/topojson-client)
+- [react-native-gesture-handler](https://github.com/software-mansion/react-native-gesture-handler)
 
 ![interactive d3 dashboard in React Native](https://github.com/JoBerkner/d3_dashboard_react_native/blob/master/final_app.gif)