* With rustls 0.23 there is no longer a dependency on ring, allowing for
  easier compilation for various targets.

28b1aaa upgrade rustls to 0.23 (Nick Farrow)

Pull request description:

  With rustls 0.23 there is no longer a dependency on ring, allowing easier compilation for various targets.

  Not super confident with my updates to `ServerCertVerifier` and `Der` of certificates (is this being tested?), needs review.

ACKs for top commit:
  notmandatory:
    utACK 28b1aaa

Tree-SHA512: 6561c4d20d446d86ca7a6c04ddb5a8acb136756606c82ca00e9b4a1f0eb2a3b00120d6db475f14474a89ebaa2ad600208d51c777cb5aeed0dcf62335a84fee5a

6cf7235 deps: bump crate version to `0.20.0` (Leonardo Lima)
78cb066 chore(deps)): upgrade `rust-bitcoin` to `0.32.0` (Leonardo Lima)

Pull request description:

  <!-- You can erase any parts of this template not applicable to your Pull Request. -->

  partially fixes [#1422](bitcoindevkit/bdk#1422)

  ### Description

  It updates the rust-bitcoin to 0.32.0, the `bitcoin` crate dependency.

  _NOTE: The overall BDK update to `0.32.0` still requires and depends on some other crates, please refer to [#1422](bitcoindevkit/bdk#1422

  <!-- Describe the purpose of this PR, what's being adding and/or fixed -->

  ### Notes to the reviewers

  It's open for any comments.
  <!-- In this section you can include notes directed to the reviewers, like explaining why some parts
  of the PR were done in a specific way -->

  ### Changelog notice

  - Update the `bitcoin` crate dependency to `0.32.0`

  <!-- Notice the release manager should include in the release tag message changelog -->
  <!-- See https://keepachangelog.com/en/1.0.0/ for examples -->

  ### 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:
  notmandatory:
    utACK 6cf7235

Tree-SHA512: c1e170d8da7687b40916b7c2de48f08ca393a2af79522abc85933bae1da6f79d2aa05d59c73b99dcbd01cc7add4def1b8a14e7858550d4e7a007c07279b45854

4b42108 ci: add test with MSRV 1.63.0 (Steve Myers)

Pull request description:

  Since the main BDK crates are changing to MSRV 1.63.0 as is LDK the CI for this project should also have an MSRV and test against it in CI.

  Also rustc 1.63 is the version shipped with the current debian stable (bookworm): https://packages.debian.org/stable/rust/rustc

ACKs for top commit:
  oleonardolima:
    utACK 4b42108
  storopoli:
    ACK 4b42108
  ValuedMammal:
    ACK 4b42108 looks good to me

Tree-SHA512: baff75887008a586af0ef0c4f50dd8c7c3de782f2dc6bc7d94c072c95205d4ef1a339860b3674dd781ad5558b98b071ed49b3a48507219b747e14c394dfe0a7b