Bump DataStructures compat (#670)

Author: simsurace

GNNlib/Project.toml

@@ -1,7 +1,7 @@
 name = "GNNlib"
 uuid = "a6a84749-d869-43f8-aacc-be26a1996e48"
 authors = ["Carlo Lucibello and contributors"]
-version = "1.2.0"
+version = "1.2.1"
 
 [workspace]
 projects = ["test", "docs", "../GNNGraphs"]
@@ -30,7 +30,7 @@ GNNlibMetalExt = "Metal"
 AMDGPU = "1"
 CUDA = "5"
 ChainRulesCore = "1.24"
-DataStructures = "0.18"
+DataStructures = "0.18, 0.19"
 GNNGraphs = "1.4"
 LinearAlgebra = "1"
 Metal = "1.0"