Fix path

[tesujimath]

Fixes #192

I just started playing with Spacehammer, looks great, thanks for making this. But the paths were broken on my system as per the linked issue. I'm using MacOS with Hammerspoon installed as a Homebrew Cask via nix-darwin, and Fennel and Spacehammer installed via Nix Home Manager

Anyway, this is what fixed it for me, although I am new to Fennel and Lua so very open to learning about a better way to do this.

[agzam]

Thank you for your contribution, the code looks fine, but I'm hesitant to merge it without knowing for sure it won't break existing workflows. And I'm afraid there's no good way of testing it out unless you have a clean slate system - no Hammerspoon, no Nix, etc. If you don't mind, I'll rather wait for another confirmation that this works and doesn't break things.

[Grazfather]

I just setup a new mac and I did not have this issue. Fennel and spacehammer installed via homebrew.

[agzam]

I didn't have this problem either, my employer upgraded my mac a couple of months ago. Seems to be Nix related, so we need a confirmation from someone using a similar setup, but I want to make 100% sure it won't break anything for non-nix users.