I would more like to see a PR that cover cli and non cli usage ( #73)

Note: input and output do not have their place in a generic config file

#73 looks like it belongs to another commit. This PR simply allows users to specify a config flag. Also you haven't settled on the file name in that issue.

cli usage is covered in the unit tests.

I will remove input and output from the config file.

Done. (it seems appveyor failed to install microtime, not sure how that happened.)

Can you also include documentation and a line in the changelog for that (as # Unreleased) ?
Thanks !

Changelog updated. By documentation do you mean the readme file? It already contains the To see all CLI options section, not sure where to add the doc. Should I add a section to specifically explain the config option?

Good point !
I will handle that from here :)
Thanks a lot.

Thank you for accepting the PR. :)

Released in 1.1.0

👏