Treed is cool, but not evolving?

Jaredly.

It looks really promising, but is it abandoned?

I tried to unpack it and run it, but it complains about package dependency problems:

Any idea how to solve this problem?

$ npm install
npm WARN unmet dependency d:\MikeK\devel\treed\node_modules\extract-text-webpack-plugin requires async@'~0.2.10' but will load
npm WARN unmet dependency d:\MikeK\devel\treed\node_modules\async,
npm WARN unmet dependency which is version 0.9.2
npm WARN unmet dependency d:\MikeK\devel\treed\node_modules\webpack requires async@'^1.3.0' but will load
npm WARN unmet dependency d:\MikeK\devel\treed\node_modules\async,
npm WARN unmet dependency which is version 0.9.2

Start by running npm install and reviewing the reported dependency warnings for extract-text-webpack-plugin, webpack, and async. The issue does not name any source files or tests, and completion is undefined beyond resolving the package dependency problems so the project can be unpacked and run.

Written by the indexing model from the issue text.