Causal-testing-framework

Formula validation did not work for direct effects. It has been rolled back, and a few minor bugs fixed.

What's Changed
* Remove Redundant Adjustment Set Calc when Formula by cwild-UoS in https://github.com/CITCOM-project/CausalTestingFramework/pull/233


**Full Changelog**: https://github.com/CITCOM-project/CausalTestingFramework/compare/v5.2.0...v5.2.1

What's Changed
* Changed numpy version in .toml file to avoid runtime exceptions. by f-allian in https://github.com/CITCOM-project/CausalTestingFramework/pull/227

New Contributors
* f-allian made their first contribution in https://github.com/CITCOM-project/CausalTestingFramework/pull/227

**Full Changelog**: https://github.com/CITCOM-project/CausalTestingFramework/compare/v5.1.1...v5.1.2

Fixed a bug where the order of causal independence tests affected causal DAG adequacy, which it should not.