fix: add pnpm version to package.json

Author: bosh-code

package.json

@@ -56,6 +56,7 @@
   "license": "MIT",
   "main": "./dist/index.js",
   "module": "./dist/index.js",
+  "packageManager": "[email protected]",
   "peerDependencies": {
     "tsdown": ">=0.10.0"
   },