fix: add main key for Bundlephobia resolver (#27)

Author: CodyJasonBennett

package.json

@@ -22,6 +22,7 @@
     "src/*"
   ],
   "type": "module",
+  "main": "./dist/index.js",
   "exports": "./dist/index.js",
   "sideEffects": false,
   "devDependencies": {