003271117cb347556cc82455558da40ef50a1156 Bump 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:
ACK 003271117cb347556cc82455558da40ef50a1156
Tree-SHA512: ac0756f52436880fe633e9ecb83f3d53f485ccfa89a3a89aa51ee4ba5da5cee87f507da69a9e1271f8aaf4425f65d04fb201ea9a4f64bce18f96039ea3548d61
9efaead8f1