Support Swift 5.9 and Emacs 29

• consume operator to end the lifetime of a variable binding
  https://github.com/apple/swift-evolution/blob/main/proposals/0366-move-function.md

• borrowing and consuming parameter ownership modifiers
  https://github.com/apple/swift-evolution/blob/main/proposals/0377-parameter-ownership-modifiers.md

• New access modifier: package
  https://github.com/apple/swift-evolution/blob/main/proposals/0386-package-access-modifier.md

• Noncopyable structs and enums
  https://github.com/apple/swift-evolution/blob/main/proposals/0390-noncopyable-structs-and-enums.md

• Value and Type Parameter Packs
  https://github.com/apple/swift-evolution/blob/main/proposals/0393-parameter-packs.md
  https://github.com/apple/swift-evolution/blob/main/proposals/0398-variadic-types.md
  https://github.com/apple/swift-evolution/blob/main/proposals/0399-tuple-of-value-pack-expansion.md

• Init Accessors
  https://github.com/apple/swift-evolution/blob/main/proposals/0400-init-accessors.md

• Macros
  https://github.com/apple/swift-evolution/blob/main/proposals/0382-expression-macros.md
  https://github.com/apple/swift-evolution/blob/main/proposals/0389-attached-macros.md
  https://github.com/apple/swift-evolution/blob/main/proposals/0397-freestanding-declaration-macros.md
  https://github.com/apple/swift-evolution/blob/main/proposals/0402-extension-macros.md

• Bug fixes and CI improvements.

Thanks @jpgrayson and @nhojb.