Update index.js
Update index.js

1.默认白名单添加em和cite;
2.修复模块不能导出whiteList和onTagAttr的BUG.
lirun3196/js-xss,theroad/js-xss,lisong521/js-xss,zhengshui/js-xss,mylikes/js-xss,lisong521/js-xss,varungpt/js-xss,57-Wolve/js-xss,57-Wolve/js-xss,lisong521/js-xss,varungpt/js-xss,zhengshui/js-xss,zhengshui/js-xss,lucoo01/js-xss,theroad/js-xss,57-Wolve/js-xss,lucoo01/js-xss,lucoo01/js-xss,lirun3196/js-xss,ccjoe/js-xss,lirun3196/js-xss,varungpt/js-xss,theroad/js-xss,mylikes/js-xss,mylikes/js-xss,ccjoe/js-xss,ccjoe/js-xss