Update README.md

Author: SSShooter

README.md

@@ -20,6 +20,7 @@ A collection of awesome browser-side [JavaScript](https://developer.mozilla.org/
   * [Data Visualization](#data-visualization)
     * [Timeline](#timeline)
     * [Spreadsheet](#spreadsheet)
+    * [Mindmap](#mindmap)
   * [Editors](#editors)
   * [Documentation](#documentation)
   * Utilities
@@ -358,7 +359,6 @@ A collection of awesome browser-side [JavaScript](https://developer.mozilla.org/
 * [cola.js](https://ialab.it.monash.edu/webcola/) - library for arranging your HTML5 documents and diagrams using constraint-based optimization techniques
 * [jointjs](https://github.com/clientIO/joint) - Diagramming library to create static diagrams or fully interactive diagramming tools.
 * [vizzu](https://github.com/vizzuhq/vizzu-lib) - Library for animated data visualizations and data stories.
-* [Mind Elixir](https://github.com/SSShooter/mind-elixir-core) - A framework-agnostic mind map core.
 
 There're also some great commercial libraries, like [amchart](https://www.amcharts.com/), [anychart](https://www.anychart.com/), [plotly](https://plotly.com/), and [lightning chart](https://www.arction.com/lightningchart-js/).
 
@@ -375,6 +375,10 @@ There're also some great commercial libraries, like [amchart](https://www.amchar
  * [Jspreadsheet CE](https://github.com/jspreadsheet/ce) - Jspreadsheet is a lightweight vanilla javascript plugin to create amazing web-based interactive tables and spreadsheets compatible with other spreadsheet software.
  * [RevoGrid](https://github.com/revolist/revogrid) - RevoGrid is a fast, responsive excel like data grid library for modern web applications.
 
+## Mindmap
+
+* [Mind Elixir](https://github.com/SSShooter/mind-elixir-core) - A framework-agnostic mind map core.
+
 ## Editors
 
 * [ace](https://github.com/ajaxorg/ace) - Ace (Ajax.org Cloud9 Editor).