Bump DataStructures to v0.19

Author: blegat

Project.toml

@@ -17,8 +17,8 @@ MutableArithmetics = "d8a4904e-b15c-11e9-3269-09a3773c0cb0"
 SemialgebraicSets = "8e049039-38e8-557d-ae3a-bc521ccf6204"
 
 [compat]
-DataStructures = "0.18"
-DynamicPolynomials = "0.5,0.6"
+DataStructures = "0.18, 0.19"
+DynamicPolynomials = "0.5, 0.6"
 IntervalArithmetic = "0.22"
 JuMP = "1"
 MathOptInterface = "1"