Merge bitcoindevkit/bdk#532: Release/0.16.0

Merge bitcoindevkit/bdk#532: Release/0.16.0

fcf422752bb440f08aa9b5384297bbb06bca8cb3 Fix 0.16.0 changelog, include WIF fix (Steve Myers)
6fb42fdea10fcff9a45dd07f966ec4f3746c369d Bump version to 0.16.1-dev (Steve Myers)
3f65e8c64bd620685e40d3b54a0893993513441b Bump version to 0.16.0 (Steve Myers)
3f0101d317ec5a1d0df60c274741ee380563d7fe Bump version to 0.16.0-rc.1 (Steve Myers)

Pull request description:

  ### Description

  Merge the 0.16.0 release branch back into the master branch.

  ### 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:
  afilini:
    ACK fcf422752bb440f08aa9b5384297bbb06bca8cb3

Tree-SHA512: 7a1e9297f4e93284e5e57124c7afe37d1fbef1da48375b310aad7fe8556be6bba00c3263e9d15540209fc99ba5e928d3fc751d0df6592c2af871599f00941a7b