fix(package): main

Author: StephanGerbeth

package.json

@@ -3,7 +3,7 @@
   "version": "2.0.0-beta.5",
   "description": "A 3D Vector lib including arithmetic operator overloading (+ - * / % **).",
   "type": "module",
-  "main": "./build/cjs/index.cjs",
+  "main": "./build/esm/index.mjs",
   "exports": {
     ".": {
       "require": "./build/cjs/index.cjs",