Merge bitcoindevkit/bdk-cli#117: Update bdk cli for wasm

Merge bitcoindevkit/bdk-cli#117: Update bdk cli for wasm

731dc74719c8988e5d22358601fed5e10ee4c6ea Add wasm build in CI (Daniela Brozzoni)
b3469b4120a08c26dec89044f792aac7a2ef26c8 Add wasm support (Daniela Brozzoni)

Pull request description:

  ### Description

  This PR adds a module to bdk-cli that exposes some structures/functions to WASM. You can see it in use here: https://github.com/bitcoindevkit/bitcoindevkit.org/pull/118

  ### Notes to the reviewers

  Based on #116

  ### 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

  #### New Features:

  * [ ] I've added tests for the new feature
  * [ ] I've added docs for the new feature
  * [x] I've updated `CHANGELOG.md`

  #### Bugfixes:

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

ACKs for top commit:
  rajarshimaitra:
    ACK 731dc74719c8988e5d22358601fed5e10ee4c6ea

Tree-SHA512: 69011ab6cb421f7e6f7dd000f9eaf5581428b2288358e31ffaec4425996951443fa2fc79f99db7de9c030d6a3fda57d25eee11564cf2fab9c745da593324f763