Add comma to init.lua in fuzzy finder dependencies

[JuanRTech]

Fixes the following regression from #384 :

Error detected while processing /Users/juanrtech/.config/nvim/init.lua:
E5112: Error while creating lua chunk: /Users/juanrtech/.config/nvim/init.lua:178: '}' expected (to close '{' at line 173) near '{'

[mech-a]

Thanks for the contribution -- we've merged this in another commit. @feoh could we close this?