Allen Lau

Hote add drag'n'drop support to QTree...

@imyelo 降级后可以了，多谢

> https://www.npmjs.com/package/@alicloud/pop-core version 7 is still not availabe.

@ricky11 Seems that pop-core does not contain oss (maybe I missed something), and i use `put`,`get` ,`multipartUpload `and `cancel` api. Agagin, seems v7 is stil long time for using

@ricky11 Yes , I found v7, but as it's not published to npm, so a little trouble to use, may offical can publish alpha or beta version for have a...

@ricky11 The size is too biiiiiiiiiiiiiiig!, and for security reason, my project set private read,and all the client have to use ali-oss, the size is a big problem!

I'v release the 7.x version that support tree shaking. free to use and add Issues. https://www.npmjs.com/package/ali-oss-sdk

@ricky11 because of local npm install is a little trouble, so I release 7.x to npm.js from official github.

Error will occur after build

@bric3 , yes and it works. ths.