CompatHelper: bump compat for SimpleGraphs to 0.8, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -61,7 +61,7 @@ Reexport = "1"
 Requires = "1"
 RuntimeGeneratedFunctions = "0.5"
 SampleChains = "0.5"
-SimpleGraphs = "0.5, 0.6, 0.7"
+SimpleGraphs = "0.5, 0.6, 0.7, 0.8"
 SimplePartitions = "0.2, 0.3"
 SimplePosets = "0.1"
 SpecialFunctions = "1, 2"