Chore: bump version to 3.2.3 (#149)

* v3.2.2

* v3.2.3

package.json

 {
   "name": "@uniswap/v2-sdk",
   "license": "MIT",
-  "version": "3.2.2",
+  "version": "3.2.3",
   "description": "🛠 An SDK for building applications on top of Uniswap V2",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",