JuliaGaussianProcesses/AbstractGPs.jl: v0.5.8

AbstractGPs v0.5.8 Diff since v0.5.7 Closed issues: [QUESTION] Using AbstractGPs.jl with Zygote (#285) Minor typo in Readme.md? (#289) Standard Error at a Point (#292) Merged pull requests: Parametric Heteroscedastic Example (#273) (@willtebbutt) test_util.jl -> TestUtils.jl in line with the (sub)module name (#274) (@st--) Update README (#275) (@willtebbutt) CompatHelper: bump compat for Turing to 0.21 for package ppl, (keep existing compat) (#276) (@github-actions[bot]) fix a few typos (#286) (@st--) Add compat entries (#287) (@willtebbutt) Improve diag_At_A and diag_At_B efficiency (#288) (@sharanry) Fix minor typo in README.md (Issue #289) (#291) (@vikram-s-narayan