chore(deps): update dependency ffigen to v12

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ffigen (source)	dev_dependencies	major	8.0.2 -> 12.0.0

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Release Notes

dart-lang/native (ffigen)

v12.0.0

• Global variables are now compatible with the ffi-native option.
• Exposing symbol addresses of functions and globals is now compatible with the
  ffi-native option.
• Add retainAndReturnPointer method to ObjC objects and blocks, and add
  castFromPointer method to blocks.
• Add -Wno-nullability-completeness as default compiler option for MacOS.
• Breaking change: Use package:objective_c in ObjC bindings.
  • ObjC packages will have a flutter dependency (until
    https://github.com/dart-lang/native/issues/1068ues/1068 is fixed).
  • Core classes such as NSString have been moved intpu package:objective_c.
  • ObjC class methods don't need the ubiquitous lib argument anymore. In
    fact, ffigen won't even generate the native library class (unless it needs
    to bind top level functions without using @Native). It is still necessary
    to DynamicLibrary.open the dylib though, to load the classes and methods.
  • Adapting to this change:
    • Update ffigen and re-run the code generation. If the generated code no
      longer contains the native library class, it means it isn't needed
      anymore. So final lib = FooNativeLib(DynamicLibrary.open('foo.dylib'));
      must be changed to DynamicLibrary.open('foo.dylib');.
    • Regardless of whether the native library class still exists, delete the
      lib parameter from all ObjC object constructors and static method calls
      and block constructors.
    • If core ObjC classes such as NSString are being used,
      package:objective_c must be imported, as they won't be exported by the
      generated bindings.
• Add --[no-]format option to ffigen command line, which controls whether the
  formatting step happens. Defaults to true.
• Delete Dart functions associated with ObjC closure blocks when the block is
  destroyed. Fihttps://github.com/dart-lang/native/issues/204/204
• Reduce cursor definition not found logs when structs/unions ->
  dependency-only is set to opaque.

v11.0.0

Compare Source

• Any compiler errors/warnings in source header files will now result in
  bindings to not be generated by default, since it may result in invalid
  bindings if the compiler makes a wrong guess. A flag --ignore-source-errors (or yaml config ignore-source-errors: true)
  must be passed to change this behaviour.
• Breaking change: Stop generating setters for global variables marked const in C.
• Fix objc_msgSend being used on arm64 platforms where it's not available.
• Fix missing comma with ffi-native functions marked leaf.
• Add support for finding libclang in Conda environment.

v10.0.0

Compare Source

• Stable release targeting Dart 3.2 using new dart:ffi features available
  in Dart 3.2 and later.
• Add support for ObjC Blocks that can be invoked from any thread, using
  NativeCallable.listener.
• Fix invalid exceptional return value ObjCBlocks that return floats.
• Fix return_of_invalid_type analysis error for ObjCBlocks.
• Fix crash in ObjC methods and blocks that return structs by value.
• Fix ObjC methods returning instancetype having the wrong type in sublasses.
• When generating typedefs for Pointer<NativeFunction<Function>>, also
  generate a typedef for the Function.
• Use Dart wrapper types in args and returns of ObjCBlocks.
• Use Dart wrapper types in args and returns of static functions.
• Renamed asset to assetId for ffi-native.

v9.0.1

Compare Source

• Fix doc comment missing on struct/union array fields.
• Allow extern inline functions to be generated.

v9.0.0

Compare Source

• Added a JSON schema for FFIgen config files.

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