fix(saber-highlighter-prism): add aliases for some languages (#220)

* fix(saber-highlighter-prism): add aliases for some languages

* fix lint

Author: meteorlxy

packages/saber-highlighter-prism/index.js

@@ -2,13 +2,19 @@ const Prism = require('prismjs')
 const { log } = require('saber-log')
 const loadLanguages = require('./loadLanguages')
 
+const languageAlias = {
+  vue: 'html',
+  sh: 'bash',
+  styl: 'stylus'
+}
+
 module.exports = (code, lang) => {
   if (!lang) return Prism.highlight(code, {})
 
   lang = lang.toLowerCase()
 
-  if (lang === 'vue') {
-    lang = 'html'
+  if (lang in languageAlias) {
+    lang = languageAlias[lang]
   }
 
   if (!Prism.languages[lang]) {