bump PrettyTables = "3.1"

Author: ablaom

Project.toml

@@ -18,7 +18,7 @@ Tables = "bd369af6-aec1-5ad0-b16a-f7cc5008161c"
 CategoricalArrays = "0.8, 0.9, 0.10, 1"
 ColorTypes = "0.9, 0.10, 0.11, 0.12"
 Distributions = "0.25.1"
-PrettyTables = "1, 2"
+PrettyTables = "3.1"
 Reexport = "1.2"
 ScientificTypesBase = "3.0"
 StatisticalTraits = "3.0"