Update dependency pigeon to v14

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
pigeon (source)	dev_dependencies	major	12.0.1 -> 14.0.1

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Release Notes

flutter/packages (pigeon)

v14.0.1

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• Updates minimum supported SDK version to Flutter 3.10/Dart 3.0.
• Updates issue_tracker link.

v14.0.0

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• Breaking change [dart] Renames locally defined host API variables.
  • [dart] Host api static field codec changed to pigeonChannelCodec.
• [dart] Adds named parameters to host API methods.
• [dart] Adds optional parameters to host API methods.
• [dart] Adds default values for class constructors and host API methods.
• Adds isEnum and isClass to TypeDeclarations.
• [cpp] Fixes FlutterError generation being tied to ErrorOr.

v13.1.2

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• Adds compatibility with analyzer 6.x.

v13.1.1

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• [kotlin] Removes unnecessary ;s in generated code.

v13.0.0

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• Breaking Change [objc] Eliminates boxing of non-nullable primitive types
  (bool, int, double). Changes required:
  • Implementations of host API methods that take non-nullable
    primitives will need to be updated to match the new signatures.
  • Calls to Flutter API methods that take non-nullable primitives will need to
    be updated to pass unboxed values.
  • Calls to non-nullable primitive property methods on generated data classes
    will need to be updated.
  • WARNING: Current versions of Xcode do not appear to warn about
    implicit NSNumber * to BOOL conversions, so code that is no longer
    correct after this breaking change may compile without warning. For example,
    myGeneratedClass.aBoolProperty = @​NO can silently set aBoolProperty to
    YES. Any data class or Flutter API interactions involving bools should
    be carefully audited by hand when updating.

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