v4.1.0 (#156)

package.json

 {
   "name": "@uniswap/v2-sdk",
   "license": "MIT",
-  "version": "4.0.1",
+  "version": "4.1.0",
   "description": "🛠 An SDK for building applications on top of Uniswap V2",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",