text: Title: Remove deprecated JS packages and get rid of vulnerability messages for dash-uploader 0.7.0  
  Body: A long time has gone from the early days of dash-uploader (there might something in the `package.json` even from the early 2018 from [dash-resumable-upload](https://github.com/rmarren1/dash-resumable-upload)).
  
  The JS word changes fast, and it would be time to:
  - [ ] Remove any dependencies in package.json that are not needed
  - [ ] Update / change any dependencies of deprecated packages
  - [ ] Update any package with known security issues, if fix available.
  
  I think this should be handled before the release of the dash-uploader 0.7.0, which aims to [fix many other things, too](https://github.com/np-8/dash-uploader/discussions/67).
  
  I'm not a front-end expert myself, so it probably will take me some time to clean the package.json. If anyone else here is more familiar with JS, and would like to take a look, please read [this](https://github.com/np-8/dash-uploader/blob/dev/docs/CONTRIBUTING.md) to get started!