Release v6.0.0

[ixti]

No description provided.

[ixti]

@tarcieri if that looks good to you - I will cut the release

[tarcieri]

Are there actually any breaking changes?

[ixti]

I believe #776 and #783 are.

Also, I just noticed a PR that I wanted to merge 4 years ago and never get to it, that I believe we should add in the release. The change will be in how readpartial work to make it more IO-alike (raising EOFError when the end is reached instead of silent empty chunk). See: #618

[ixti]

Alternative - I can cherry pick retriable and headers caching and cut 5.3.0 release instead.

[tarcieri]

I’d definitely like to roll forward rather than backward, but v6.0.0 would be a great time to update the timeout subsystem: #773

[ixti]

Will merge #773

[tarcieri]

#773 is an issue, not a PR. Perhaps we should ping the people mentioned in that issue to see if they can open a PR, though

[ixti]

Oh, I have confused it with #754 indeed

[tarcieri]

I made a last call for breaking changes to the timeout subsystem in #773, though perhaps we should merge #754 first as well