fix: main fallback to correct cjs

Author: cuppachino

package.json

@@ -12,7 +12,7 @@
   "author": "Ajai Shankar",
   "license": "MIT",
   "type": "module",
-  "main": "./dist/cjs/index.js",
+  "main": "./dist/cjs/index.cjs",
   "module": "./dist/esm/index.js",
   "exports": {
     "types": "./dist/index.d.ts",