mrbayes 0.5.3

• The minimum version of R is now 4.3.0. This is required by the distributional package (a transitive dependency via rstan → loo → posterior), which uses chooseOpsMethod() (introduced in R 4.3.0).
• Fixes for segfault on macOS ARM runners on r-universe.
• Bump roxygen2 to 8.0.0.
• Fix hardcoded 3-exposure loop in MVMR-Egger print/summary.
• Fix broken "joint" prior branch in mvmr_egger_rjags().
• Fix sigma parameterization in mr_radialegger_rjags().
• Fix wrong function name in Stan MVMR error messages.
• Complete the sigma < 1 warning message in egger rjags functions.
• Fix bmi_insulin column count in documentation.
• Fix comment typos in egger rjags functions.
• Constrain prior to 1-3 in mvmregger.stan.
• Remove no-op prior self-assignment in rjags functions.
• Check for rjags before class in MVMR rjags functions.
• Widen non-informative intercept prior in mregger.stan.