Flutter upgrade to 3.13 generates compile problems with flutter libraries

I’ve just upgraded to Flutter 3.13 and now my Flutter Windows app fails to compile..

[√] Flutter (Channel stable, 3.13.0, on Microsoft Windows [Version 10.0.19044.3086], locale en-GB)
[√] Windows Version (Installed version of Windows is version 10 or higher)

The following errors are reported…

Waiting for connection from debug service on Chrome...
/C:/Users/Ian/AppData/Local/Pub/Cache/hosted/pub.dev/sliver_tools-0.2.10/lib/src/sliver_stack.dart:282:55: Error: A value of type 'RenderObject?' can't be assigned to a variable of type 'AbstractNode?'.
 - 'RenderObject' is from 'package:flutter/src/rendering/object.dart' ('../../sdk/flutter/packages/flutter/lib/src/rendering/object.dart').
 - 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('../../sdk/flutter/packages/flutter/lib/src/foundation/node.dart').
      final AbstractNode? targetParent = renderObject.parent;
                                                      ^
/C:/Users/Ian/AppData/Local/Pub/Cache/hosted/pub.dev/sliver_tools-0.2.10/lib/src/sliver_stack.dart:283:54: Error: The method 'markNeedsLayout' isn't defined for the class 'AbstractNode?'.
 - 'AbstractNode' is from 'package:flutter/src/foundation/node.dart' ('../../sdk/flutter/packages/flutter/lib/src/foundation/node.dart').
Try correcting the name to the name of an existing method, or defining a method named 'markNeedsLayout'.
      if (targetParent is RenderObject) targetParent.markNeedsLayout();
                                                     ^^^^^^^^^^^^^^^

Any suggestions on how to fix this?