Update Project.toml

Author: ChrisRackauckas

Project.toml

@@ -22,7 +22,7 @@ UnPack = "3a884ed6-31ef-47d7-9d2a-63182c4928ed"
 
 [compat]
 ArrayInterfaceCore = "0.1.1"
-DocStringExtensions = "0.8"
+DocStringExtensions = "0.8, 0.9"
 GPUArraysCore = "0.1"
 IterativeSolvers = "0.9.2"
 KLU = "0.3.0"