chore: re-add mapRoot to tsconfig

Author: filipesilva

addon/ng2/blueprints/ng2/files/__path__/tsconfig.json

@@ -10,7 +10,7 @@
     "rootDir": ".",
     "sourceMap": true,
     "target": "es5",
-    "maproot": "/",
+    "mapRoot": "/",
     "inlinesource": true
   },
   "compileOnSave": false,