Merge bitcoindevkit/bdk-cli#219: Bump version to 2.0.0

fd67b7ab2e244ab4cdc13e59eb60b4d25040a56d bump version to 2.0.0 (Vihiga Tyonum)

Pull request description:

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  ### Description

  This PR bump version to 2.0.0

  Fixes #215

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

  ### 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

ACKs for top commit:
  notmandatory:
    ACK fd67b7ab2e244ab4cdc13e59eb60b4d25040a56d

Tree-SHA512: abd59fe0c600c643c61c5bc8a973698a951b68f86e1d474e8a92f458d3d1f133737165c948b1a765d71a694d0b82e4abf4f65e50e1721640284233e8c343c4ea