chore(package): explicitly declare js module type (#181)

Author: Fdawgs

package.json

@@ -28,6 +28,7 @@
   "license": "MIT",
   "version": "3.2.0",
   "main": "index.js",
+  "type": "commonjs",
   "types": "types/index.d.ts",
   "scripts": {
     "lint": "eslint .",