Make vinyl files more web File like

### Describe your idea for a new feature
I propose making the virtual files more web- Blob/File IDL like by introducing: `stream()`, `text()`, `arrayBuffer()`, `slice()`, `size`, `name` and `type`

### Explain the problem your idea is trying to solve
I think ppl would feel more at home if virtual files where more like web Blob/File (in fact they are introduced into NodeJS at this point globally)
if they behaved more like Blob/Files then it would also be possible to use them with eg `fetch` and `FormData` and you would even be able to concat files together using `new Blob([ virualFileA, virualFileB ])` - that's if you are using [fetch-blob](https://github.com/node-fetch/fetch-blob#creating-blobs-backed-up-by-other-async-sources)

### If this feature could exist outside of gulp (like as a plugin or a module), would you be interested in helping to create and maintain it?

Hmm, it could exist outside of gulp, but then i would have to add new prototype methods to vinyl files. or extend it...