Add types export

Author: JoshMock

package.json

@@ -7,7 +7,8 @@
   "types": "index.d.ts",
   "exports": {
     "require": "./index.js",
-    "import": "./index.js"
+    "import": "./index.js",
+    "types": "./index.d.ts"
   },
   "scripts": {
     "test": "npm run build && npm run lint && tap",