fix main

Author: xcarpentier

package.json

@@ -2,7 +2,7 @@
   "name": "rn-pdf-reader-js",
   "version": "3.0.0",
   "description": "PDF reader for Expo",
-  "main": "lib/index.js",
+  "main": "node_modules/expo/AppEntry.js",
   "types": "lib/index.d.ts",
   "author": "Xavier Carpentier <[email protected]> (https://xaviercarpentier.com/)",
   "license": "MIT",