title: Cannot assign to property: 'actions' is a get-only property
body: <p>I am making my first app and here is my biggest problem. I would like to make a notification in which i can add actions to it based of user input. I have made a category with no actions at first and then with a for loop I try to create actions and at the same time add it to the category but here is the problem where it shows:
  Cannot assign to property: 'actions' is a get-only property</p>
  
  <p>Here is my code:</p>
  
  <pre><code>var category5 = UNNotificationCategory(identifier: "category.5", actions: [], intentIdentifiers: [], hiddenPreviewsBodyPlaceholder: "placeholdertext", options: [])
  
      for index in 0..&lt;workingDays[3].subjects!.count {
           let action = UNNotificationAction(identifier: "\(workingDays[3].subjects![index + 1].subjectName).5", title: workingDays[3].subjects![index + 1].subjectName, options: .foreground)
  
                  category5.actions += [action]  // here I get the error
                  // category5.actions.append(action) // I tried this as well but I get the same error
              }
  </code></pre>
  
  <p>How can i fix my problem and is there another way of doing this? I would like the actions array to be mutable so I can also later remove some actions from it.</p>
  
  <p>Any help would be much much appreciated and It for me that would mean dream come true !</p>