feat: convert to using exports field

package.json

@@ -9,9 +9,19 @@
   },
   "license": "MIT",
   "packageManager": "[email protected]",
-  "main": "lib/index.js",
-  "module": "esm/index.js",
-  "types": "esm/index.d.ts",
+  "exports": {
+    ".": {
+      "require": "./lib/index.js",
+      "default": "./esm/index.js"
+    }
+  },
+  "typesVersions": {
+    "*": {
+      ".": [
+        "./esm/index.d.ts"
+      ]
+    }
+  },
   "sideEffects": false,
   "files": [
     "lib",