Add notes in readme about CSS-in-JS

Author: bartveneman

readme.md

@@ -19,16 +19,16 @@
 Existing packages like
 [get-css](https://github.com/cssstats/cssstats/tree/master/packages/get-css)
 look at a server-generated piece of HTML and get all the `<link>` and `<style>`
-tags from it. This works fine for 100% server rendered pages, but apps that
-employ style injection with JavaScript will not be covered.
+tags from it. This works fine for 100% server rendered pages, and pages with 
+CSS-in-JS styling.
 
 ### Solution
 
 This module uses an instance of Chromium to render a page. This has the benefit
 that most of the styles can be rendered, even when generated by JavaScript. The
 [Puppeteer CSSCoverage API](https://github.com/GoogleChrome/puppeteer/blob/master/docs/api.md#coveragestartcsscoverageoptions)
 is the power behind finding most of the CSS. Additionally, the
-`document.styleSheets` API is used.
+`document.styleSheets` API is used to get CSS-inJS styling.
 
 ## Installation