Merge pull request doocs#21 from doocs/feature-rebuild

feat: rebuild project

build: release v1.3.3

* 修复代码块滚动条消息并自动换行的问题(https://gitee.com/Doocs/md/issues/I1LQY4)
* 修复侧边滚动条宽度问题

Update package.json

fix: update word break style

hotfix: bug fix

fix: resolve resetting problem

修复重置问题

feat: add image upload format and size limitation

受公众号限制，上传图片的大小不能超过 5M

fix: update css2json and fix doocs#7

修复页面卡死问题(doocs#7)

feat: add one-click paste and upload image function

添加一键粘贴上传图片功能

feat: add one-click download function

新增一键下载功能