003271117cBump bdk version to 1.0.0-alpha.3 (Steve Myers) Pull request description: ### Description - Bump bdk version to 1.0.0-alpha.3 - Bump bdk_chain to 0.7.0 - Bump bdk_bitcoin_rpc to 0.2.0 - Bump bdk_electrum to 0.5.0 ### Notes to the reviewers ### Changelog notice See #1254 ### Checklists #### All Submissions: * [x] I've signed all my commits * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md) * [x] I ran `cargo fmt` and `cargo clippy` before committing ACKs for top commit: evanlinjin: ACK003271117cTree-SHA512: ac0756f52436880fe633e9ecb83f3d53f485ccfa89a3a89aa51ee4ba5da5cee87f507da69a9e1271f8aaf4425f65d04fb201ea9a4f64bce18f96039ea3548d61