[NonGNU ELPA] Treeview version 1.1.0

[ELPA update]

Version 1.1.0 of package Treeview has just been released in NonGNU ELPA.
You can now find it in M-x package-list RET.

Treeview describes itself as:
  A generic tree navigation library

More at https://elpa.nongnu.org/nongnu/treeview.html