Better experience with npx

[roymiloh]

When I do, for instance, npx qnm --why x - there's a post-install script that installs smth (with tabtab). I've not checked why, but it's a bit frustrating to install it every time I use npx (and wait for npm install under the hood).

[ranyitz]

Thanks @roymiloh for reporting this, I've removed the post install script and added a custom command instead. https://github.com/ranyitz/qnm/blob/master/README.md#install-completions

Available from 0.13.2