build: cargo update

[szokeasaurusrex]

Run cargo update to bump all dependencies to the latest versions.

Stacked on #970.

[Dav1dde]

Makes sense, but looks like it breaks MSRV as crates may not consider MSRV for breaking changes.

[szokeasaurusrex]

@Dav1dde, indeed; I believe we will need to bump MSRV. I'm also thinking we may wish to define a clearer MSRV policy in the SDK; as I understand it, most crates do not consider MSRV bumps to be semver-breaking changes, so we should adopt an explicit policy as to which versions we aim to support

[szokeasaurusrex]

@Dav1dde, I have bumped MSRV to 1.88 in #970, and stacked this PR on top. MSRV tests appear to be passing.

[Dav1dde]

@lcian's suggestion with changing the resolver is an interesting idea, because overall you're not actually changing the practical MSRV (since there still is a configuration of dependencies which satisfies the original MSRV), just CI which we use fails with the dependencies specified in this lock file.

Changing MSRV overall is also fine, I would still be careful to not bump individual dependency ranges (e.g. from 1.1 to 1.9), if not necessary.