fix: escape text in code block when lang is text or not specified #31 (#32)

Author: lazzzis

lib/markdown/highlight.js

@@ -1,11 +1,15 @@
 const chalk = require('chalk')
 const prism = require('prismjs')
 const loadLanguages = require('prismjs/components/index')
+const escapeHtml = require('escape-html')
 
 // required to make embedded highlighting work...
 loadLanguages(['markup', 'css', 'javascript'])
 
 function wrap (code, lang) {
+  if (lang === 'text') {
+    code = escapeHtml(code)
+  }
   return `<pre v-pre class="language-${lang}"><code>${code}</code></pre>`
 }