fix: typescript declaration for type module (#28)

Co-authored-by: Clément Fassot <[email protected]>

Author: Ked57

package.json

@@ -16,8 +16,14 @@
   },
   "exports": {
     ".": {
-      "import": "./dist/index.es.js",
-      "require": "./dist/index.umd.js"
+      "import": {
+        "default": "./dist/index.es.js",
+        "types": "./dist/index.d.ts"
+      },
+      "require": {
+        "default": "./dist/index.umd.js",
+        "types": "./dist/index.d.ts"
+      }
     }
   },
   "scripts": {