1.1.0: This release adds functionality around identifying outliers.

This release adds functionality around identifying outliers.

• the Statistex struct comes with more keys: :lower_outlier_bound, :upper_outlier_bound & :outliers,
  along with the new public functions :outliers/2 and :outlier_bounds/2.
• statistics/2 now also accepts exclude_outliers: true to exclude the outliers from the calculation
  of statistics.
• some functions have also been updated to accept more optional arguments such as :sorted? to avoid unnecessary extra work.

Huge thanks for these changes go to @NickNeck!