Merge pull request #437 from SciML/yet_another_DS_bump

Yet another bump for DataStructures

Author: pogudingleb

Project.toml

@@ -33,7 +33,7 @@ AbstractAlgebra = "0.42, 0.43, 0.44, 0.45, 0.46"
 Aqua = "0.8"
 CPUSummary = "0.2"
 Combinatorics = "1"
-DataStructures = "0.18"
+DataStructures = "0.18, 0.19"
 Dates = "1.10, 1.11"
 Groebner = "0.9"
 IterTools = "1"