Update out of date dependencies

[va-an]

With a local installation, we see warnings about deprecated structs:

-> % cargo install --path . --all-features
...
warning: use of deprecated enum `bdk_wallet::signer::SignerError`: PSBT signing was moved to `bitcoin::psbt` module
  --> src/error.rs:79:45
   |
79 |     SignerError(#[from] bdk_wallet::signer::SignerError),
   |                                             ^^^^^^^^^^^
   |
   = note: `#[warn(deprecated)]` on by default
...

This happens because local installation does not take Cargo.lock into account and pulls the latest compatible dependency versions. In particular, the warnings come from bdk_wallet 2.3.0.

What have to be done:

• update bdk_wallet to version 2.3.0
• fix the code where required to address deprecations
• update other outdated dependencies as well (see: https://deps.rs/repo/github/bitcoindevkit/bdk-cli).