flutterバグ解消(DiagnosticableMixin not found)

バグ解消時のメモ

flutter_svgの非互換によるバグが発生。下記issueを元に解決を図ったので、メモ程度に投稿

バグ内容

~/develop/flutter/Google-Calendar-API-Flutter-Example- $ flutter run
Warning: You are using these overridden dependencies:
! flutter_svg 0.17.4 (1.0.0 available)
Running "flutter pub get" in Google-Calendar-API-Flutter-Example-...         3.3s
Launching lib/main.dart on iPhone 13 Pro in debug mode...
Running Xcode build...                                                  
Xcode build done.                                           16.0s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **


Xcode's output:
↳
    ../../../.asdf/installs/flutter/2.8.0-stable/.pub-cache/hosted/pub.dartlang.org/flutter_datetime_picker-1.3.8/lib/src/datetime_picker_theme.dart:6:28: Error: Type 'DiagnosticableMixin' not found.
    class DatePickerTheme with DiagnosticableMixin {
                               ^^^^^^^^^^^^^^^^^^^
    ../../../.asdf/installs/flutter/2.8.0-stable/.pub-cache/hosted/pub.dartlang.org/flutter_datetime_picker-1.3.8/lib/src/datetime_picker_theme.dart:6:7: Error: The type 'DiagnosticableMixin' can't be mixed in.
    class DatePickerTheme with DiagnosticableMixin {
          ^
    ../../../.asdf/installs/flutter/2.8.0-stable/.pub-cache/hosted/pub.dartlang.org/flutter_datetime_picker-1.3.8/lib/flutter_datetime_picker.dart:215:48: Error: No named parameter with the name 'shadowThemeOnly'.
        ThemeData inheritTheme = Theme.of(context, shadowThemeOnly: true);
                                                   ^^^^^^^^^^^^^^^
    ../../../.asdf/installs/flutter/2.8.0-stable/packages/flutter/lib/src/material/theme.dart:106:20: Context: Found this candidate, but the arguments don't match.
      static ThemeData of(BuildContext context) {
                       ^^
    Failed to package /Users/kawamurakouji/develop/flutter/Google-Calendar-API-Flutter-Example-.
    Command PhaseScriptExecution failed with a nonzero exit code
    note: Using new build system
    note: Planning
    note: Build preparation complete
    note: Building targets in dependency order

Could not build the application for the simulator.
Error launching application on iPhone 13 Pro.

バグの解消方法

pubspec.ymlに下記を追加し、pubspec.lockを削除のうえ、ビルドしなおす。

pubspec.yml

dependency_overrides:
   flutter_svg: ^0.17.4

■参考
https://github.com/dnfield/flutter_svg/issues/368