fix(readme): show npm package status

Author: altaywtf

README.md

@@ -6,6 +6,10 @@
   <h1>put.io design</h1>
 
   <p>Public design tokens and design-system guidance for <a href="https://put.io">put.io</a>.</p>
+
+  <p>
+    <a href="https://www.npmjs.com/package/@putdotio/design" style="text-decoration:none;"><img src="https://img.shields.io/npm/v/%40putdotio%2Fdesign?style=flat&label=npm&logo=npm&colorA=000000&colorB=000000" alt="npm version"></a>
+  </p>
 </div>
 
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