Fix: rename esplora scan to full_scan

[thunderbiscuit]

This should have been applied on the move to alpha 3. It renames the scan method on the Esplora client to full_scan, as per the latest esplora crate version (0.5.0).

Notes to the reviewers

Sorry I missed it on my last PR!

Changelog notice

Changed
  - The scan method on the Esplora client is renamed to full_scan [#442]

[#442]: https://github.com/bitcoindevkit/bdk-ffi/pull/442

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

[reez]

I don't see that bdk_file_store is needed for this PR from my review/testing from what I can tell, so maybe would remove bdk_file_store = { version = "0.3.0" } from Cargo.toml if possible. I know it's probably needed for #436 and will get added anyway, but nice to have it added in that PR instead of this PR based on the scope of the changes each PR.

But approving this either way, good work!

ACK f0a3217

[thunderbiscuit]

Yes totally. I removed it. Will rebase my other PR.