Flutter 升级到1.20.0后打包报错解决方法

在打包命令后加入 --no-tree-shake-icons

flutter build apk --release --target-platform android-arm --no-tree-shake-icons

flutter build appbundle --release --target-platform android-arm,android-arm64 --no-tree-shake-icons

flutter build ios --release --no-tree-shake-icons