v2.3.0: Bump bl from 4.0.2 to 4.0.3 in /tests_zemu (#5)

Bumps [bl](https://github.com/rvagg/bl) from 4.0.2 to 4.0.3.
- [Release notes](https://github.com/rvagg/bl/releases)
- [Commits](https://github.com/rvagg/bl/compare/v4.0.2...v4.0.3)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

v2.0.3

small fix for unit tests

v2.0.2

fixing ed25591 derivation and updating test

v2.0.1

Fixing Nano X UI

v2.0.0: Zxlib restructure (#1)

* moving to common structure
* restructure tests
* Upgrading zxlib