Update progress to 1.5

[pquentin]

This progress release contains verigak/progress#61, a PR that I submitted hoping that it would end up in pip: the ETA and average speed are no longer updated at every tick, but only once per second.

Indeed, when pip installing large packages with a slow/unreliable connection, the information changed so often as to be unreadable. The estimate is still not really good: progress only considers the last 10 updates, ie. the last ~100kB downloaded by pip. But I think that's a different issue that can be solved in another progress PR.

[eli-schwartz]

I was just about to submit a PR for this myself. :D https://github.com/eli-schwartz/pip/tree/progress-update

You'll need to update src/pip/_internal/utils/ui.py as well, or this simply won't work...

[pquentin]

@eli-schwartz Nice catch, thanks! I used rsync to update the files, but forgot to pass --delete, so I still had helpers.py, which is why it was still working. I added a commit to fix this. We could use your commit too, but I think you need to replace 1.15 with 1.5 first.

[eli-schwartz]

Replace what? :D

Also, you can use invoke vendoring.update to run the entire vendoring process properly, which would have the same effect without surprising rsync snafus.

[pquentin]

I see what you did there. :)

And thanks for the invoke tip!

[cjerdonek]

I would also add a .feature news entry with a description of the changes that pip users will notice.

[pquentin]

Thanks, done in 2ce546e

[cjerdonek]

@pradyunsg Does this look okay to you for updating a vendored library?

[pquentin]

Rebased on top of master to get the CI fixes

[lock]

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