Merge pull request #1 from rwjblue/patch-1

fix: Trigger `MasonUpdateAllCompleted` after last notification message

🐛fix(notification): The final notification was not appearing as the l…

…ast notification.

♻️refactor(`update_all`): has been broken into smaller semantically m…

…eaningful functions.

This makes the code easier to follow without adding an excess of
abstraction layers.