Use range dependency for hashes v0.12.0 - v0.13.0

[tcharding]

There are zero code changes required to support v.0.13.0 so we elect to use a range dependency to make the upgrade path for downstream users more pleasant.

Upgrade the dependency of hashes to be either v0.12.0 or v0.13.0

Use v0.13.0 in the recent/minimal lockfiles.

[apoelstra]

Nice.

So, given that there are literally no changes to the codebase, I think we should change Cargo.toml to allow a range of versions of hashes. At least 0.12-0.13 but we could probably even move the 0.12 backward.

Then I'd have to think about what we want to do with the lockfiles...maybe we want a separate one for each major version of hashes?

[tcharding]

So, given that there are literally no changes to the codebase, I think we should change Cargo.toml to allow a range of versions of hashes.

What is the benefit of this?

[apoelstra]

@tcharding it lets people update their dependencies piecemeal rather than all at once.

[apoelstra]

And I suspect it will make our own upgrade process smoother.

[tcharding]

And I suspect it will make our own upgrade process smoother.

Well I guess it means we don't have to do the secp upgrade and hashes upgrade in the same commit/PR, that's something. I'll add it.

[tcharding]

I dodged the lockfile complexity by just using 0.13.0 - I don't have the stomach for more cargo junk on a Saturday morning.

[tcharding]

error: component 'rust-std' for target 'mipsel-unknown-linux-gnu' is unavailable for download for channel 'stable'

Que? I can force push later to re-run the jobs, no other clue what these fails mean.

[apoelstra]

"unavailable for download' is probably transient. Seems safe to ignore for now.

[apoelstra]

ACK 9364214

[apoelstra]

I dodged the lockfile complexity by just using 0.13.0 - I don't have the stomach for more cargo junk on a Saturday morning.

Lol, sounds good. There's no particular reason to test this yet. Though we should remember to add some better tests if we ever start actually using bitcoin_hashes, or the ThirtyTwoByteHash trait changes.