【Flutter】flutter_launcher_iconsでアイコンを生成するときに出てきたエラー

はじめに

flutter_launcher_iconsを使ってアイコンを生成しようと思った時、以下のようなエラーがでてきてしましました。

(base) HanachirunoMacBook-Pro:templete_mail_app hanachiru$ flutter pub pub run flutter_launcher_icons:main
Failed to precompile flutter_launcher_icons:main:
../../flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.6.1/lib/android.dart:164:45: Error: Getter not found: 'AVERAGE'.
    newFile = copyResize(image, e.size, -1, AVERAGE);
                                            ^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.6.1/lib/android.dart:164:25: Error: Too many positional arguments: 1 allowed, but 4 found.
Try removing the extra positional arguments.
    newFile = copyResize(image, e.size, -1, AVERAGE);
                        ^
../../flutter/.pub-cache/hosted/pub.dartlang.org/image-2.1.4/lib/src/transform/copy_resize.dart:14:7: Context: Found this candidate, but the arguments don't match.
Image copyResize(Image src, {int width, int height,
      ^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.6.1/lib/android.dart:166:45: Error: Getter not found: 'LINEAR'.
    newFile = copyResize(image, e.size, -1, LINEAR);
                                            ^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.6.1/lib/android.dart:166:25: Error: Too many positional arguments: 1 allowed, but 4 found.
Try removing the extra positional arguments.
    newFile = copyResize(image, e.size, -1, LINEAR);
                        ^
../../flutter/.pub-cache/hosted/pub.dartlang.org/image-2.1.4/lib/src/transform/copy_resize.dart:14:7: Context: Found this candidate, but the arguments don't match.
Image copyResize(Image src, {int width, int height,
      ^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.6.1/lib/android.dart:176:49: Error: Getter not found: 'AVERAGE'.
    newFile = copyResize(image, e.size, e.size, AVERAGE);
                                                ^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.6.1/lib/android.dart:176:25: Error: Too many positional arguments: 1 allowed, but 4 found.
Try removing the extra positional arguments.
    newFile = copyResize(image, e.size, e.size, AVERAGE);
                        ^
../../flutter/.pub-cache/hosted/pub.dartlang.org/image-2.1.4/lib/src/transform/copy_resize.dart:14:7: Context: Found this candidate, but the arguments don't match.
Image copyResize(Image src, {int width, int height,
      ^^^^^^^^^^
../../flutter/.pub-cache/hosted/pub.dartlang.org/flutter_launcher_icons-0.6.1/lib/android.dart:178:49: Error: Getter not found: 'LINEAR'.
    newFile = copyResize(image, e.size, e.size, LINEAR);
                                                ^^^^^^
pub finished with exit code 1