feat: allow cli options as config options
feat: allow cli options as config options

Allow things that can be passed in as cli options to be specified in the
config. Keeping as undocumented for now.

Closes: #128

walmartlabs/grunt-bump,halkon/grunt-bump,tischler/grunt-bump,XciD/grunt-bump,blargism/grunt-bump,dan-kushnaryov/grunt-bump,vojtajina/grunt-bump,legalthings/grunt-bump