Merge bitcoindevkit/bdk#648: test: BDK won't add unconf inputs when fee bumping

5d00f8238886a993ef21056e5b3e216a4aae6951 test that BDK won't add unconf inputs when fee bumping (Daniela Brozzoni)
98748906f6799041341227de33bec20e8c6ef4b0 test: fix populate_test_db conf calculation (Daniela Brozzoni)
1d9fdd01faf3a0f17c57381a7c54d136e9d69ffe Remove wrong TODO comment in build_fee_bump (Daniela Brozzoni)

Pull request description:

  ### Description

  Closes #144

  ### Notes to reviewers

  #144 is describing a bug that doesn't seem to happen in BDK master anymore (BDK not respecting BIP125 rule 2). This PR just adds a test to check that the bug is fixed.

  ### 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

  #### Bugfixes:

  * [ ] This pull request breaks the existing API
  * [x] 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:
  afilini:
    ACK 5d00f8238886a993ef21056e5b3e216a4aae6951

Tree-SHA512: 95833f3566f9716762884d65f3f656346482e45525a3e92efa86710b9f574fdd9af7d235f1f425e4298d6ff380db9af60d1d2008ccde2588d971757db2d136b8

diff --cc src/wallet/mod.rs
Simple merge