执行：composer update 时，提示：No valid bower.json was found in any branch or tag of ....的解决方法
1、执行：composer update 时，提示：No valid bower.json was found in any branch or tag of https://github.com/blueimp/JavaScript-Canvas-to-Blob.git, could not load a package from it. 如图1图12、执行：composer gl...
