Merge bitcoindevkit/bdk#1009: Pin log dependency to 0.4.18 to keep the MSRV to 1...

Merge bitcoindevkit/bdk#1009: Pin log dependency to 0.4.18 to keep the MSRV to 1.57.0

fa54a2e3a5096b263388b9f729ba1cb42574072e Pin log dependency to 0.4.18 to keep the MSRV to 1.57.0 (Daniela Brozzoni)

Pull request description:

  ### 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 fa54a2e3a5096b263388b9f729ba1cb42574072e

Tree-SHA512: 5fc19dd8485fcfe88c2720ff183dac7bfb6cacefa7be0c23aa1e7b345d81d1e41ac0903d84c5606b00adf2314911ee9d25972bfd4f0764e70456c8d8ffb3ab33