1.3.0

What's Changed

• Migrate from AppKit to SwiftUI by @yaslab in #2
• Refactor code that uses IOPowerSources by @yaslab in #3
• Implement the UI with SwiftUI by @yaslab in #4
• Refactoring the UI implementation by @yaslab in #5
• Refactor PowerSource by @yaslab in #6
• Update version to 1.3 by @yaslab in #7

Full Changelog: 1.2.0...1.3.0