fix: add package.json to exports (#1059)

Co-authored-by: Iiro Jäppinen <[email protected]>

Author: numandev1

package.json

@@ -18,7 +18,10 @@
   },
   "type": "module",
   "bin": "./bin/lint-staged.js",
-  "exports": "./lib/index.js",
+  "exports": {
+    ".": "./lib/index.js",
+    "./package.json": "./package.json"
+  },
   "files": [
     "bin",
     "lib"