bump bitcoind dependency and version

[apoelstra]

Needed to update rust-elements.

[apoelstra]

I did not look at whether the latest version of bitcoind supports any new bitcoind versions or features; I just bumped the dep and checked whether it worked.

In fact we could do a ranged dependency, changing from 0.34 to ">=0.34.0, <=0.36.0" ... and probably even lower the range below 0.34.0. But I don't think there's really any value in doing that. It would let people use the same elementsd version across multiple versions of bitcoin but what does that gain us?

[RCasatta]

Sorry for the delay, I was in PTO...

ACK 328e1f6

In fact we could do a ranged dependency, changing from 0.34 to ">=0.34.0, <=0.36.0" ... and probably even lower the range below 0.34.0. But I don't think there's really any value in doing that. It would let people use the same elementsd version across multiple versions of bitcoin but what does that gain us?

Having range dep could help in avoiding multiple versions in some cases? but I think it can introduce some maintenance cost (should multiple version being tested than?) So, yeah, I don't think it's worth it.

[RCasatta]

Sorry for the delay, I was in PTO...

BTW I now added @LeoComandini as mantainer, I forgot this one was without a second mantainer

[RCasatta]

And also released on crate https://crates.io/crates/elementsd