CompatHelper: bump compat for DocStringExtensions to 0.9, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -37,7 +37,7 @@ DataStructures = "0.18"
 DiffEqBase = "6.19"
 DiffEqJump = "6.7.4, 7, 8"
 DiffEqNoiseProcess = "5.0.0"
-DocStringExtensions = "0.8"
+DocStringExtensions = "0.8, 0.9"
 FillArrays = "0.6, 0.7, 0.8, 0.9, 0.10, 0.11, 0.12, 0.13"
 FiniteDiff = "2"
 ForwardDiff = "0.10.3"