Release/0.16.1

[notmandatory]

Description

This is a bug fix release. Cherry picked #539 and #550 so projects using bdk ^0.16 like bdk-cli will be able to do a cargo update and not be broken. Also need this since our 0.17.0 release is running late.

Notes to the reviewers

Checklists

All Submissions:

• I've signed all my commits
• I followed the contribution guidelines
• 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
• 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

[codecov]

Codecov Report

Merging #552 (552765b) into master (fcf4227) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #552   +/-   ##
=======================================
  Coverage   73.30%   73.30%           
=======================================
  Files          35       35           
  Lines        7540     7540           
=======================================
  Hits         5527     5527           
  Misses       2013     2013           

Impacted Files	Coverage Δ
src/lib.rs	85.05% <ø> (ø)

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