Update README to make icon list

Author: barrymcgee

README.md

@@ -4,9 +4,9 @@
 [![CircleCI](https://circleci.com/gh/barrymcgee/gatsby-plugin-scroll-indicator/tree/develop.svg?style=svg)](https://circleci.com/gh/barrymcgee/gatsby-plugin-scroll-indicator/tree/develop)
 
 
-🔥 Easily add a page scroll indicator to your Gatsby site.
-👨🏼‍💻A 3px high indicator bar will progress along the top of your viewport as you scroll down the page.
-🎨 The color is of the indicator bar is a configurable option.
+- 🔥 Easily add a page scroll indicator to your Gatsby site.
+- 👨🏼‍💻A 3px high indicator bar will progress along the top of your viewport as you scroll down the page.
+- 🎨 The color is of the indicator bar is a configurable option.
 
 ![Scroll Indicator demo](https://d1c0hjomoutdrw.cloudfront.net/items/170H1P370U03360N0m06/Screen%20Recording%202019-02-19%20at%2001.48%20pm.gif?X-CloudApp-Visitor-Id=2701498 'Scroll Indicator demo')