fix(json-map-keys): add types

Author: tiagoporto

packages/json-map-keys/package.json

@@ -26,7 +26,7 @@
     "main": "./dist/index.js"
   },
   "files": [
-    "index.mjs"
+    "/dist"
   ],
   "scripts": {
     "prepack": "pnpm build",