function onDevDeps( error ) {
		if ( error ) {
			debug( 'Encountered an error when resolving package dev dependencies: %s', error.message );
			return done( error );
		}
		debug( 'Successfully resolved package dev dependencies.' );
		done();
	}
Callback invoked upon resolving package dev dependencies.

@private
@param {(Error|null)} error - error object
@param {ObjectArray} results - results
@returns {void}