SwiftUI Visual Effects 1.0.3

• Licensed the project.
• Added support for state changes.
• Moved the following structures to a Wrappers folder in Sources/SwiftUIVisualEffects:
  • _BlurVisualEffectViewRepresentable
  • _VibrancyVisualEffectViewRepresentable
• Moved BlurEffect to a new file, BlurEffect.swift, in Sources/SwiftUIVisualEffects.