This release increments the version of ex_fairness to 0.5.1. The primary change
is an update to the crucible_framework dependency, moving from version 0.5.0
to 0.5.2.

Changes included in this commit:
- Bumped project version to 0.5.1 in mix.exs.
- Updated crucible_framework dependency to ~> 0.5.2 in mix.exs and mix.lock.
- Added release entry for 0.5.1 to CHANGELOG.md and updated version links.
- Updated installation instructions in README.md to reflect the new version.