0.4.20 release planning

[hoodmane]

Currently to build downstream packages for targets emscripten, I clone a fork of chrono with #593 backported onto v0.4.19 and patch the downstream package's Cargo.toml by adding

+[patch.crates-io]
+chrono = { path =  "path/to/forked/chrono" }

I am looking forward to not having to do this.

[djc]

We can do a beta release for now, see #676. In order to get to a 0.4.20 final release I want to merge #677 (or some other solution for #499) and ideally we'll then do some release candidate testing.

[cramhead]

I notice that version 0.4.19 is using version 0.1.43 of the time crate. I noticed https://rustsec.org/advisories/RUSTSEC-2020-0071 today via cargo audit. After looking into time a little I see that time is now on version 0.3.9, https://github.com/time-rs/time/blob/main/Cargo.toml.
Could we add an upgrade to time to the next release?
I'd be happy to contribute, but I'm pretty new to rust.

[Stargateur]

@cramhead this CVE doesn't affect chrono see #602

[krojew]

Any info when the new version will be released?

[djc]

I guess we can release it at any time and make further compatible changes later. Let's get a beta or rc out first (see #676) so we can get some more testing before we push this out to the rest of the world.

[cgorski-airtime]

Is there a preferred way to track and provide feedback for the beta release? I am interested in helping to get the beta into an official release.

[djc]

I've published 0.4.20-beta.1 to crates.io, would be happy to get everyone to test it!

[hoodmane]

Thanks @djc and chrono maintainers!

[djc]

I've published an rc.1 and written up some release notes for it: https://github.com/chronotope/chrono/releases/tag/v0.4.20-rc.1. Please let me know if anything is missing/unclear (@esheppa would especially value your feedback on the release notes).

[esheppa]

@djc - the release notes look great! (However they made me realize that I probably need to document the behavior of the caching of the tzfile data)

Potentially we could add the following:

• Rkyv support: add optional rkyv support #644 and add missing rkyv derives #701
• Implement std::iter::Sum for Duration #522

[djc]

rkyv support was already there, near the top of the additions. I missed #522 on my previous run, and also added #572, #588 and #609.

[djc]

0.4.20 has been released!

[Xuanwo]

databend has switched it's chrono's stream back to chronotope/chrono in datafuselabs/databend#6928.

No build failure, no tests broken, no performance regression.

I believe this version is good for everyone to upgrade.

Nice work @djc!