add uploader demo to tests

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#11,128 opened on May 11, 2020 12 comments 0 reactions 0 assignees View on GitHub

help wanted

Description

![image](https://user-images.githubusercontent.com/172564/81587600-7c5a3f00-9374-11ea-99a3-c6aedbd1b692.png)

https://github.com/tecan/emscripten-projects/tree/master/Loaders/Uploader

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