Additional maintainers

[notmandatory]

@stevenroose would you be open to adding additional maintainers on this repo? I know you're taking care of a bunch of other repos and it looks like this one hasn't been getting enough attention in terms of ACK'd PRs being merged and creating regular releases. I ask because this repo is a dependency for bitcoindevkit/bdk. I found a dev from the BDK team, @vladimirfomene who said he'd be happy help out as a maintainer, he's currently also the maintainer for the bitcoindevkit/rust-esplora-client repo. And/or @tcharding are you able to help?

[tcharding]

Yep I can help, no worries.

[notmandatory]

thanks @tcharding !

[quad]

Does this still need help?

I'd be happy to "volunteer" too, as my $work at $job deeply depends on both the rust-bitcoin ecosystem and the BDK.

[tcharding]

@quad more reviewers are always welcome in all the repos within the github.com/rust-bitcoin organisation, we are super short on reviewers (same as every open source project ever).