Compilation errors in Unity 6.5

[laicasaane]

TreeView and TreeViewItem obsoletion is now an error in Unity 6.5

Library\PackageCache\jp.co.cyberagent.smartaddresser@702228fd377a\Editor\Foundation\EasyTreeView\TreeViewBase.cs(17,42): error CS0619: 'TreeView' is obsolete: 'TreeView is now deprecated. You can likely now use TreeView instead and not think more about it. But if you were using that identifier to store InstanceID data, you should instead opt to upgrade your TreeViews to use TreeView to get the proper typing.'

Library\PackageCache\jp.co.cyberagent.smartaddresser@702228fd377a\Editor\Foundation\EasyTreeView\TreeViewBase.cs(86,29): error CS0619: 'TreeViewItem' is obsolete: 'TreeViewItem is now deprecated. You can likely now use TreeViewItem instead and not think more about it. But if you were using that identifier to store InstanceID data, you should instead opt to upgrade your TreeViews to use TreeViewItem to get the proper typing.'