breaking changes: toc 配置更改，頁面支持 toc 顯示 close #636

feat: 代碼框設置高度限制，展開後按鈕不會消失，可點擊再次摺疊 close #637
feat: 增加 no-lightbox class 偵測，可配置 fancybox 和 medium-zoom 不應用於圖片 #636
fix: 修復開啟 lazyload 時， fancybox 的縮略圖顯示 lazyload 加載圖片的 bug

package.json

@@ -1,6 +1,6 @@
 {
   "name": "hexo-theme-butterfly",
-  "version": "4.0.0-b3",
+  "version": "4.0.0-b4",
   "description": "A Simple and Card UI Design theme for Hexo",
   "main": "package.json",
   "scripts": {
@@ -20,7 +20,7 @@
   },
   "bugs": {
     "url": "https://github.com/jerryc127/hexo-theme-butterfly/issues",
-    "email": "btf@immyw.com"
+    "email": "i@immyw.com"
   },
   "dependencies": {
     "hexo-renderer-stylus": "^2.0.1",