chore: add badge links and requirements to readme

README.md

@@ -1,4 +1,4 @@
-![License](https://img.shields.io/npm/l/react-compare-slider) ![npm](https://img.shields.io/npm/v/react-compare-slider) ![npm bundle size](https://img.shields.io/bundlephobia/minzip/react-compare-slider)
+[![License](https://img.shields.io/npm/l/react-compare-slider)](./README.md) [![npm](https://img.shields.io/npm/v/react-compare-slider)](https://npmjs.com/package/react-compare-slider) [![npm bundle size](https://img.shields.io/bundlephobia/minzip/react-compare-slider)](https://bundlephobia.com/result?p=react-compare-slider)
 [![Build Status](https://github.com/nerdyman/react-compare-slider/workflows/node-ci/badge.svg)](https://github.com/nerdyman/react-compare-slider/workflows/node-ci)
 
 # React Compare Slider
@@ -13,9 +13,13 @@ Compare two components, side-by-side or top-to-toe.
 - Responsive, fluid
 - Fully customisable
 - Works in IE11+
-- Teeny-tiny, only one ponyfill dependency
+- [Teeny-tiny](https://bundlephobia.com/result?p=react-compare-slider), only one ponyfill dependency
 - Type safe
 
+## Requirements
+
+- React 16.8+
+
 ## Demo
 
 ### CodeSandbox