add npm shield

gretzke · gretzke · commit 4de28148f9ee · 2024-07-31T22:57:53.000+02:00
diff --git a/README.md b/README.md
@@ -1,3 +1,5 @@
 ## Uniswap Interfaces
 
+[![NPM Version](https://img.shields.io/npm/v/@uniswap/interfaces.svg?style=flat)](https://www.npmjs.com/package/@uniswap/interfaces)
+
 This repo contains all interfaces from various Uniswap Protocol smart contracts.
