Update to Node v10.17.0

[mcollina]

This is important because it adds:

• Readable.from()
• Makes async iteration stable

[mcollina]

@vweevers have you got an idea on why the browser tests are not running at all?

[vweevers]

Maybe because it's running on node 13? I haven't tested airtap on 13 yet.

[vweevers]

Looks like the same thing is happening on node 12.

@mcollina Does npm run test-browser-local work locally?

[mcollina]

@vweevers turns out the problem was in the code. They are passing locally now.

[mcollina]

@vweevers there seems to be an issue with IE11. The new Readable.from() internally uses async iteration, which we compile down to generators to support Node 6. However, generators are not available in IE11.

I see a some options:

1. Drop IE 11, but this would be better done in a semver-major release.
2. pluck out Readable.from from readable-stream
3. pluck out Readable.from from the browser build of readable-stream
4. do a browser build that ship regenerator or analog

I do not see many other options, but maybe there are.

I would really like to ship this update because it will remove the warning for async iteration. It’s about time.

[vweevers]

Drop IE 11, but this would be better done in a semver-major release

+1. For what it's worth, feross's buffer will likely also drop IE11 in a next major, which will then propagate to browserify, airtap, etc.

pluck out Readable.from from readable-stream

-1. Modularity is good, but in this case it's too surprising for users, because readable-stream is meant to mirror node streams. For a browserify build to "just work" it would have to detect Readable.from somehow and shim it separately. Perhaps it's worth a discussion in node. These static methods (from, finished, pipeline, events.once) would be easier to shim and tree-shake if they were separate modules in core.

pluck out Readable.from from the browser build of readable-stream

If you mean disabling it (until the next major) then +1.

do a browser build that ship regenerator or analog

-1. Although regenerator is small, it does add up if multiple modules include it, so I think polyfilling like this should be an application concern.

[mcollina]

Updated to Node 10.18.1, let's see how it goes.

[mcollina]

🎉 CI is passing.

@vweevers @mafintosh would you like to take a final look?

[vweevers]

Approved it seconds before your comment :)

I suggest updating the PR title for the record.