JaxGaussianProcesses/GPJax: V0.5.6

What's Changed Stabilize covariance learning with FillScaleTriL and update config behaviour by @patel-zeel in https://github.com/JaxGaussianProcesses/GPJax/pull/163 Circleci by @thomaspinder in https://github.com/JaxGaussianProcesses/GPJax/pull/168 Versioneer by @thomaspinder in https://github.com/JaxGaussianProcesses/GPJax/pull/166 Address Jax/Jaxlib v0.4.x compatibility, incorporate CircleCI testing workflows, incorporate versioneer. by @thomaspinder in https://github.com/JaxGaussianProcesses/GPJax/pull/164 New Contributors @patel-zeel made their first contribution in https://github.com/JaxGaussianProcesses/GPJax/pull/163 Full Changelog: https://github.com/JaxGaussianProcesses/GPJax/compare/v0.5.5...v0.5.