Merge bitcoindevkit/bdk-cli#217: deps: bump tracing-subscriber to 0.3.20

Merge bitcoindevkit/bdk-cli#217: deps: bump tracing-subscriber to 0.3.20

4810403246e4d077a8a06b2c02a353c13d6e80fc deps: bump tracing-subscriber to 0.3.20 (Vihiga Tyonum)

Pull request description:

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  ### Description

  Fixes #216
  <!-- Describe the purpose of this PR, what's being adding and/or fixed -->

  <!-- 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
  - Bumped `tracing-subscriber` to 0.3.20
  <!-- 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-cli/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

  #### Bugfixes:

  * [ ] This pull request breaks the existing API
  * [ ] I've added tests to reproduce the issue which are now passing
  * [x] I'm linking the issue being fixed by this PR

ACKs for top commit:
  notmandatory:
    ACK 4810403246e4d077a8a06b2c02a353c13d6e80fc

Tree-SHA512: d27c9e677b6cb390dae3e1037bc8c4771e98af16a579ad93368f12535409aa286ce193ef943600d2a13ad396bf06ece9f4a11da43fea0e7cc517d316ffd02d2f