feat(emojify): add no-emoji option

docs/configuration.md

@@ -295,3 +295,13 @@ window.$docsify = {
 ```
 
 Note that if you are running an external script, e.g. an embedded jsfiddle demo, make sure to include the [external-script](plugins?id=external-script) plugin.
+
+## no-emoji
+
+Disabled emoji parse.
+
+```js
+window.$docsify = {
+  noEmoji: true
+}
+```

docs/zh-cn/configuration.md

@@ -305,3 +305,13 @@ window.$docsify = {
 ```
 
 注意如果执行的是一个外链脚本，比如 jsfiddle 的内嵌 demo，请确保引入 [external-script](zh-cn/plugins?id=外链脚本-external-script) 插件。
+
+## no-emoji
+
+禁用 emoji 解析。
+
+```js
+window.$docsify = {
+  noEmoji: true
+}
+```