CompatHelper: add new compat entry for FiniteDiff at version 2, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -61,6 +61,7 @@ DistributedFactorGraphs = "0.21, 0.22"
 Distributions = "0.24, 0.25"
 DocStringExtensions = "0.8, 0.9"
 FileIO = "1"
+FiniteDiff = "2"
 FiniteDifferences = "0.12"
 FunctionalStateMachine = "0.2.9"
 JSON3 = "1"