Support Swift 5.10 and Swift 6

• Support nonisolated(unsafe).
  https://github.com/apple/swift-evolution/blob/main/proposals/0412-strict-concurrency-for-global-variables.md
• Support typed throws.
  https://github.com/swiftlang/swift-evolution/blob/main/proposals/0413-typed-throws.md
• Support sending keyword.
  https://github.com/swiftlang/swift-evolution/blob/main/proposals/0430-transferring-parameters-and-results.md
• Other fixes and CI improvements.

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.

Support Swift 5.8 and part of 5.9

• Add keywords for conditional compilation and annotations.
  • hasFeature
    https://github.com/apple/swift-evolution/blob/main/proposals/0362-piecemeal-future-features.md
  • hasAttribute
    https://github.com/apple/swift-evolution/blob/main/proposals/0367-conditional-attributes.md
  • before
    https://github.com/apple/swift-evolution/blob/main/proposals/0376-function-back-deployment.md
  • Various environment names
• if expresison and switch expression (Swift 5.9).
  https://github.com/apple/swift-evolution/blob/main/proposals/0380-if-switch-expressions.md
• Bug fixes and CI improvements.

Support Swift 5.7

• async let
• Existential any
• #unavailable keyword
• noasync keyword
• Distributed actor
• Regex literals
• Other small fixes.

Filling comments and strings

fill-paragraph, fill-region, and auto filling in comments and strings, based on woolsweater's work.

• Recognizes some Markdown blocks.
• Handles multiline comments:

  /* aaa bbb ccc */
  ↓↑
  /*
    aaa
    bbb
    ccc
  */
  

• If swift-mode:fill-paragraph-entire-comment-or-string is non-nil, fill-paragraph fills the entire comment.
• If comment-fill-column is defined, it is used in comments rather than fill-column.

Fixed face of function names

Function names are now correctly faced with swift-mode:function-name-face.

Fixes #174.

Fix Imenu for open curly braces on its own line

Fix #173.

Support Swift 5.5

Support Swift 5.5 features not included in v8.3.0:

• async let
• nonisolated/isolated
• get async throws

Async/await and actor

• Adds support to async/await and actor.
• Fix M-j and C-M-j for Emacs 27.

Font Locking for negation operator, and other fixes

• Add support for font-locking negation operator.
• Fix swift-mode:debug-ios-app for newer Xcode.
• Fix indentations and font-locks.
• Fix documentations.
• Fix GitHub Actions.
• Migrated to Eldev.

Thanks @jcs090218, @woolsweater, and @danielmartin.