chore: update dev version

[reez]

Description

Step 27 of bitcoindevkit/bdk-ffi#809

Notes to the reviewers

Changelog notice

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• I ran cargo fmt and cargo clippy before committing

New Features:

• I've added tests for the new feature
• I've added docs for the new feature

Bugfixes:

• This pull request breaks the existing API
• I've added tests to reproduce the issue which are now passing
• I'm linking the issue being fixed by this PR

[thunderbiscuit]

This PR inadvertently picked up changes in the bdk-ffi submodule (or was that on purpose?). I think it'd be simpler to just bump the setup.py file on its own (or else let me know).