docs: correct empty whiteList typing in examples

README.md

@@ -455,7 +455,7 @@ img1, img2, img3, img4
 ```javascript
 var source = "<strong>hello</strong><script>alert(/xss/);</script>end";
 var html = xss(source, {
-  whiteList: [], // empty, means filter out all tags
+  whiteList: {}, // empty, means filter out all tags
   stripIgnoreTag: true, // filter out all HTML not in the whitelist
   stripIgnoreTagBody: ["script"] // the script tag is a special case, we need
   // to filter out its content

README.zh.md

@@ -442,7 +442,7 @@ img1, img2, img3, img4
 ```javascript
 var source = "<strong>hello</strong><script>alert(/xss/);</script>end";
 var html = xss(source, {
-  whiteList: [], // 白名单为空，表示过滤所有标签
+  whiteList: {}, // 白名单为空，表示过滤所有标签
   stripIgnoreTag: true, // 过滤所有非白名单标签的HTML
   stripIgnoreTagBody: ["script"] // script标签较特殊，需要过滤标签中间的内容
 });

example/strip_tag.js

@@ -8,7 +8,7 @@ var xss = require('../');
 
 var source = '<strong>hello</strong><script>alert(/xss/);</script>end';
 var html = xss(source, {
-  whiteList:          [],        // 白名单为空，表示过滤所有标签
+  whiteList:          {},        // 白名单为空，表示过滤所有标签
   stripIgnoreTag:     true,      // 过滤所有非白名单标签的HTML
   stripIgnoreTagBody: ['script'] // script标签较特殊，需要过滤标签中间的内容
 });