udapting tsconfig for ts2.1

src/tsconfig.json

@@ -4,6 +4,7 @@
     "experimentalDecorators": true,
     "module": "commonjs",
     "target": "es5",
-    "sourceMap": true
+    "sourceMap": true,
+    "lib": ["dom", "es2015.promise", "es5"]
   }
 }