Updated to the latest version of Swift

Ads free age Calculator

Rebuilt in the latest version of Swift
Added colour changes for dark mode

This update from Apple will improve the functionality of this app. No new features are included.

Fix bug when changing to a shorter month. e.g. 31st December > November

- Restyled for iPhone X
- Now lets you customise the three ages to check against

Rebuilt in Swift. One page layout.

"Slide for result" arrow now points the correct way