Update README.md

README.md

@@ -78,3 +78,8 @@ web
 ├── vue.config.js  -- vue-cli 配置
 └── package.json  -- package.json
 ```
+#### License
+```dx
+MegEngine is Licensed under the Apache License, Version 2.0
+Copyright (c) 2014-2021 Megvii Inc. All rights reserved.
+```