Add stdf package type is module

packages/stdf/package.json

@@ -1,6 +1,6 @@
 {
     "name": "stdf",
-    "version": "0.2.1",
+    "version": "0.2.2",
     "description": "Mobile web component library based on Svelte and Tailwind",
     "main": "index.js",
     "scripts": {
@@ -21,5 +21,6 @@
     "repository": {
         "type": "git",
         "url": "https://github.com/dufu1991/stdf"
-    }
+    },
+    "type": "module"
 }