CLI --config path does not raise issue 44 if non-existing config file is passed

[sappelhoff]

maybe related #1165

According to these lines: https://github.com/bids-standard/bids-validator/blob/970921cbf2e3e85df195ca16f63ee460c588e596/bids-validator/utils/options.js#L65-L72

the following bids-validator call should raise issue 44

(again, from bids-examples repo root): bids-validator eeg_matchingpennies --config $PWD/iDontExist.json

But no error is raised.