Update eslint instructions in docs (#6084)

Add a note that it will work in IDE with 2.0.3 and later

Author: LukasWerfel

docusaurus/docs/setting-up-your-editor.md

@@ -13,6 +13,7 @@ To configure the syntax highlighting in your favorite text editor, head to the [
 ## Displaying Lint Output in the Editor
 
 > Note: this feature is available with `react-scripts@0.2.0` and higher.<br>
+> It works out of the box for newly created projects with `react-scripts@2.0.3` and higher.<br>
 > It also only works with npm 3 or higher.
 
 Some editors, including Sublime Text, Atom, and Visual Studio Code, provide plugins for ESLint.