[BUG] Node-Tree-Kill does not work on macOS

[pyrox0]

Describe the bug
As described in pkrumins/node-tree-kill#28, tree-kill does not work on macOS.

To Reproduce
Steps to reproduce the behavior:
This is currently hard to reproduce, as it only happens on macOS, and >99% of flashpoint activity is on Windows. However, in my work porting flashpoint to mac, this bug comes up.

Expected behavior
I expected flashpoint to kill the process.

Screenshots
See the logs here: https://logs.unstable.life/log?id=4BVSXUSS

Desktop (please complete the following information):

• OS: macOS
• Flashpoint Version 10, built from branch release/10.0.0 latest commit
• Log text: See screenshots.

Additional contextI and another developer, ColdIce#0001 on discord, suggest using tmbr as a replacement, as it is more recently updated and seems to have a simpler syntax than tree-kill.

[LindirQuenya]

It seems that I can't use GitHub's built-in "assign" feature, so I'll use a comment as a substitute.

This is what I'm currently working on.