Download file using a stream

**Before you start**
Have you checked StackOverflow, previous issues, and Dropbox Developer Forums for help?
Yes

**What is your question?**
I'd like to have an option to download files using a stream.
Big files (1gb) crash my node.js process due to memory limitations

**Screenshots**
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**Versions**
* What version of the SDK are you using?
8.2.0
* What version of the language are you using?
Node.js 12LTS
* Are you using Javascript or Typescript?
javascript
* What platform are you using? (if applicable)

**Additional context**
Add any other context about the question here.