fix: added missing export types for module (#465)

Author: james-nair

package.json

@@ -15,7 +15,8 @@
   "exports": {
     ".": {
       "import": "./lib/esm/index.js",
-      "require": "./lib/cjs/index.js"
+      "require": "./lib/cjs/index.js",
+      "types": "./lib/types/index.t.ts",
     }
   },
   "module": "lib/esm/index.js",