stream: export namespace object from internal end-of-stream module

[Renegade334]

The current structure of internal/streams/end-of-stream sets module.exports to the eos function, and defines other exports as properties on this function.

However, eos is exported directly from the public stream API, which currently exposes the rest of the module along with it.

Changed to a conventional module namespace.

[nodejs-github-bot]

Review requested:

• @nodejs/streams

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.53%. Comparing base (91a9978) to head (db1690e).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #61455      +/-   ##
==========================================
- Coverage   88.54%   88.53%   -0.01%     
==========================================
  Files         704      704              
  Lines      208971   208973       +2     
  Branches    40341    40341              
==========================================
- Hits       185026   185011      -15     
- Misses      15919    15936      +17     
  Partials     8026     8026              

Files with missing lines	Coverage Δ
lib/internal/streams/add-abort-signal.js	100.00% <100.00%> (ø)
lib/internal/streams/compose.js	96.88% <100.00%> (ø)
lib/internal/streams/duplexify.js	96.56% <100.00%> (ø)
lib/internal/streams/end-of-stream.js	97.42% <100.00%> (+0.01%)	⬆️
lib/internal/streams/pipeline.js	95.12% <100.00%> (ø)
lib/internal/streams/readable.js	96.26% <100.00%> (ø)
lib/internal/streams/writable.js	96.64% <100.00%> (ø)
lib/internal/webstreams/adapters.js	85.57% <100.00%> (ø)
lib/stream.js	100.00% <100.00%> (ø)

... and 36 files with indirect coverage changes

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[MattiasBuelens]

Is this technically a breaking change? Would there be someone out there that was using require('stream').finished.finished?

And even if they were, they really should be using require('stream/promises').finished instead... 😅

[Renegade334]

Would there be someone out there that was using require('stream').finished.finished?

GH code search shows no uses, I wouldn't say there's any great benefit to marking this as a major change, but happy to be overruled.