Update uuid dep to 1.x

[waywardmonkeys]

This is exposed in the public API (if the feature is enabled), I think ... so this is probably a breaking change?

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This change is 

[jdm]

Yes, this will be breaking.

[atouchet]

uuid 0.8 is now out.

[atouchet]

The stable uuid 1.0 release is out now.

[atouchet]

@waywardmonkeys I still see the commit as bumping it to 0.7. Was there a mixup here?

[waywardmonkeys]

@atouchet Whoops, yes. Fixed now.

[mrobinson]

This is probably a good moment to merge this because the next version will be a major version bump, necessary for a few other breaking changes (upgrading bitflags among others).

[waywardmonkeys]

Thanks! We'd almost made it to 6 years!