correlation 0.8.3

Breaking Changes

• distance_mahalanobis() is deprecated. Use performance::check_outliers(method = "mahalanobis_robust") instead.

• The minimum needed R version has been bumped to 3.6.

Minor Changes

• Fixes breakages caused by updates to parameters package (#269).

• The visualization recipe (plots) for redundant correlation matrices was
  improved, so self-correlations will no longer be labelled and get a neutral
  color.

• The print() method redundant correlation matrices no longer shows the
  diagonal with self-correlations.