Library not compatible with upcoming Flutter version => BETA channel

[karkolia]

When switching to Flutter beta channel instead of stable (for other bug fixing reasons), a build error appears :

` ../../../../.pub-cache/hosted/pub.dev/skeletons-0.0.3/lib/src/widgets.dart:56:42: Error: The getter 'backgroundColor' isn't defined for the class 'ThemeData'.

• 'ThemeData' is from 'package:flutter/src/material/theme_data.dart' ('../../../../Library/Flutter/sdk/packages/flutter/lib/src/material/theme_data.dart'). Try correcting the name to the name of an existing getter, or defining a getter or field named 'backgroundColor'. color: Theme.of(context).backgroundColor, `

The use of Theme.of(context).backgroundColor in implementation of SkeletonAvatar makes the build fail.

[jordanliu]

Package seems like it isn't maintained, I created a version though: https://pub.dev/packages/flutter_skeleton_ui