Keystone v1.3.0

Added

• Tap a ⌘ or ⌥ key on its own to switch the input source — left, right, or both sides of each, chosen in Settings. Every shortcut using the key keeps working: a lone press-and-release is the whole gesture.
• Watching for that tap is the one Keystone feature that observes keys, so it asks for the Input Monitoring permission — and only once it's turned on.

Fixed

• Settings panes now scroll when their content is taller than the window.