Update project from newer web template.

Author: Layoric

ExampleDataApis/package.json

@@ -1,5 +1,5 @@
 {
     "scripts": {
-        "dtos": "x ts && tsc -m umd dtos.ts && x -e \"mv('dtos.js','wwwroot/dtos.js')\""
+        "dtos": "x mjs"
     }
 }