chore: add language ts support (#431)

lib/default-theme/styles/code.styl

@@ -42,6 +42,10 @@ div[class="language-js"], div[class="language-javascript"]
   &:before
     content "js"
 
+div[class="language-ts"], div[class="language-typescript"]
+  &:before
+    content "ts"
+
 div[class="language-html"], div[class="language-markup"]
   &:before
     content "html"

lib/markdown/highlight.js

@@ -25,6 +25,9 @@ module.exports = (str, lang) => {
   if (lang === 'md') {
     lang = 'markdown'
   }
+  if (lang === 'ts') {
+    lang = 'typescript'
+  }
   if (!prism.languages[lang]) {
     try {
       loadLanguages([lang])