code: function getConfigFromCommandLine(argv) {
  	const options = {};
  	forEach(argv, (value, key) => {
  		if (key.startsWith('config:')) {
  			options[key.replace(/^config:/, '')] = value;
  		}
  	});
  	return options;
  }
docs: Get config options from command line, passed as --config:foo bar.
  
  @param {Object} argv
  @return {Object}