Bump bdk and bdk-cli to version 0.28.0

[notmandatory]

Description

Bump bdk and bdk-cli to version 0.28.0

Notes to the reviewers

The bump to bdk 0.28.0 only required adding the new std feature, since bdk-cli disables default features.

Changelog notice

Changes

• Bump bdk version to 0.28.

Checklists

All Submissions:

• [x] I've signed all my commits
• [x] I followed the contribution guidelines
• [x] I ran cargo fmt and cargo clippy before committing

New Features:

• [x] I've updated CHANGELOG.md

[notmandatory]

Looks like there's a problem with building for 0.57 so moved this to draft status until I (or someone else) can take a look.

[adoerr]

Looks like there's a problem with building for 0.57 so moved this to draft status until I (or someone else) can take a look.

You might want to try

cargo update -p zstd-sys --precise "2.0.4+zstd.1.5.2"

since this seems to be the offending dependency.