fix: update readme (#166)

Author: jaredLunde

README.md

@@ -3,8 +3,12 @@
   <h1 align="center">
     🧱 masonic
   </h1>
-</div>
 
+  <div align="center">
+    <a href="https://flexstack.com"><img src="https://flexstack.com/images/supported-by-flexstack.svg" height="38" alt="Supported by FlexStack"></a>
+  </div>
+</div>
+<hr>
 <p align="center">
   <a href="https://bundlephobia.com/result?p=masonic">
     <img alt="Bundlephobia" src="https://img.shields.io/bundlephobia/minzip/masonic?style=for-the-badge&labelColor=24292e">
@@ -27,7 +31,6 @@
 </p>
 
 <pre align="center">npm i masonic</pre>
-<hr>
 
 A performant and versatile virtualized masonry grid for React based on Brian Vaughn's [react-virtualized](https://github.com/bvaughn/react-virtualized)
 and further inspired by [react-window](https://github.com/bvaughn/react-window).