fix: remove stale package entry fields (#37)

Author: chenjiahan

package.json

@@ -12,8 +12,6 @@
       "require": "./dist/index.cjs"
     }
   },
-  "main": "./dist/index.js",
-  "module": "./dist/index.mjs",
   "types": "./dist/index.d.ts",
   "files": [
     "dist"