v0.22 breaks backward compatibility about rustls

[daniel-pfeiffer]

Thanks for the detailed clarification! 🙏🏻

[ctz]

0.21 to 0.22 is a major version change.

[cpu]

A minor version bump shouldn't break things.
...
0.21 to 0.22 is a major version change.

I think the confusion here is that you're thinking of our versioning as if Rustls were v1.y.z, but we're following the conventional Cargo semver guidelines where:

releases starting with “0.y.z” can treat changes in “y” as a major release, and “z” as a minor release.

The 0.22.0 changelog details the breaking changes that were made since 0.21, including the change to RootCertStore called out here.

The main branch of ureq has already been updated to accommodate those changes (algesten/ureq#690). You may need to inquire with the ureq maintainers to find out when they plan to release a new version with the 0.22 update.