Update Rust crate bdk_electrum to 0.20.0 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
bdk_electrum (source)	dependencies	minor	0.19.0 -> 0.20.0

---

Release Notes

bitcoindevkit/bdk (bdk_electrum)

v0.20.0

Compare Source

• New MSRV set to 1.56.1
• Fee sniping discouraging through nLockTime - if the user specifies a current_height, we use that as a nlocktime, otherwise we use the last sync height (or 0 if we never synced)
• Fix hang when ElectrumBlockchainConfig::stop_gap is zero.
• Set coin type in BIP44, BIP49, and BIP84 templates
• Get block hash given a block height - A get_block_hash method is now defined on the GetBlockHash trait and implemented on every blockchain backend. This method expects a block height and returns the corresponding block hash.
• Add remove_partial_sigs and try_finalize to SignOptions
• Deprecate AddressValidator
• Fix Electrum wallet sync potentially causing address index decrement - compare proposed index and current index before applying batch operations during sync.

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.