CompatHelper: add new compat entry for "DifferentialEquations" at version "6.16" (#71)

Author: github-actions[bot]

Project.toml

@@ -24,6 +24,7 @@ Turing = "fce5fe82-541a-59a6-adf8-730c64b5f9a0"
 CSV = "0.8"
 CategoricalArrays = "0.9"
 DataFrames = "0.22"
+DifferentialEquations = "6.16"
 Distributions = "0.24"
 Franklin = "0.10"
 Gadfly = "1.3"