chore(example): add finished property on examples

Author: posva

examples/index.html

@@ -73,6 +73,7 @@
  addTodo: function () {
  if (this.newTodoText) {
  todos.add({
+ finished: false,
  text: this.newTodoText,
  created: firebase.firestore.FieldValue.serverTimestamp()
  })