Merge pull request #69 from SciML/compathelper/new_version/2020-08-17-21-12-46-990-2685407026

CompatHelper: bump compat for "DataStructures" to "0.18"

Author: devmotion

Project.toml

@@ -12,7 +12,7 @@ ModelingToolkit = "961ee093-0014-501f-94e3-6117800e7a78"
 Reexport = "189a3867-3050-52da-a836-e630ba90ab69"
 
 [compat]
-DataStructures = "0.17"
+DataStructures = "0.17, 0.18"
 DiffEqBase = "6.5"
 Latexify = "0.11, 0.12, 0.13"
 ModelingToolkit = "1.3, 2.0, 3.0"