Update package.json exports field to properly export types for each build type

Author: csandman

package.json

@@ -14,8 +14,14 @@
   },
   "exports": {
     ".": {
-      "import": "./dist/index.mjs",
-      "require": "./dist/index.js"
+      "import": {
+        "types": "./dist/index.d.mts",
+        "default": "./dist/index.mjs"
+      },
+      "require": {
+        "types": "./dist/index.d.ts",
+        "default": "./dist/index.js"
+      }
     },
     "./package.json": "./package.json"
   },