feat: make dispatcher truly global

[mcollina]

Fixes #1331

[codecov-commenter]

Codecov Report

Merging #1405 (fcb7dad) into main (c3da945) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1405   +/-   ##
=======================================
  Coverage   94.28%   94.29%           
=======================================
  Files          47       48    +1     
  Lines        4250     4256    +6     
=======================================
+ Hits         4007     4013    +6     
  Misses        243      243           

Impacted Files	Coverage Δ
index.js	100.00% <100.00%> (ø)
lib/global.js	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c3da945...fcb7dad. Read the comment docs.

[delvedor]

Great work! I still think it would be useful to encode in the global dispatcher the version, even if we are not using it right now.
In this case if in the future there is the need to do a breaking change, we already have the code to handle it.

[mcollina]

@delvedor done.

[delvedor]

LGTM

[djmadeira]

@delvedor @mcollina this doesn't seem to work. It works fine when using undici's fetch, but elasticsearch uses a pool, which doesn't seem to pick up the global dispatcher at all. Any thoughts on a fix?

[mcollina]

@delvedor uses a pool, so it's bypassing this system. I'd recommend the ES client to accept an undici dispatcher as an option.