code: function getCredits(projectPath, credits) {
  	credits = credits || [];
  
  	const depPath = path.join(projectPath, 'node_modules');
  
  	globby.sync(`${depPath}/**/package.json`)
  		.forEach(packagePath => {
  			getNpmCredits(packagePath, credits);
  		});
  
  	return credits;
  }
docs: Read project root and evaluate dependency credits for node modules
  
  @param  {String} projectPath      absolute path to project root
  @param  {Array|undefined} credits list of credits
  @param  {Array|undefined} seen    list of already iterated packages
  
  @return {Array}                   list of credits