CompatHelper: bump compat for "SpecialFunctions" to "2"

Author: github-actions[bot]

Project.toml

@@ -19,7 +19,7 @@ ToeplitzMatrices = "c751599d-da0a-543b-9d20-d0a503d91d24"
 Distributions = "0.21, 0.22, 0.23, 0.24, 0.25"
 Interpolations = "0.12, 0.13"
 MAT = "0.6, 0.7, 0.8, 0.9, 0.10"
-SpecialFunctions = "0.8, 0.9, 0.10, 1.0"
+SpecialFunctions = "0.8, 0.9, 0.10, 1.0, 2"
 StaticArrays = "0.12, 1.1"
 StatsBase = "0.32, 0.33"
 ToeplitzMatrices = "0.6, 0.7"