Flutter 3.0 build error

[tetianazakhozhaeva]

../../.pub-cache/hosted/pub.dartlang.org/flutter_placeholder_textlines-1.1.2/lib/placeholder_lines.dart:113:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
 - 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('../../snap/flutter/common/flutter/packages/flutter/lib/src/widgets/binding.dart').
    WidgetsBinding.instance!.addPostFrameCallback(_setupAnimation);