Feature: run external script after pywal

[Jajafarov]

I think it would be useful to have s way to run an external script after pywal has finished similar to the wal -o flag. At the moment I need to run a script after pywal finishes to relaunch bspwm and dunst. If I could either specify a path to the script to run or maybe even choose what flags to run pywal with, I'd be happy.