CompatHelper: bump compat for Optim to 2, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -1,7 +1,7 @@
 name = "ARCHModels"
 uuid = "6d3278bc-c23a-5105-85e5-0d57d2bf684f"
-authors = ["Simon Broda <simon.broda@alumni.ethz.ch> and contributors."]
 version = "2.6.1"
+authors = ["Simon Broda <simon.broda@alumni.ethz.ch> and contributors."]
 
 [deps]
 DataFrames = "a93c6f00-e57d-5684-b7b6-d8193f3e46c0"
@@ -34,7 +34,7 @@ ForwardDiff = "0.10.4, 1"
 GLM = "1.3.5"
 HypothesisTests = "0.8, 0.9, 0.10, 0.11"
 MuladdMacro = "0.2.2"
-Optim = "0.19.3, 0.20, 0.21, 0.22, 1.0"
+Optim = "0.19.3, 0.20, 0.21, 0.22, 1.0, 2"
 PrecompileTools = "1.0"
 Reexport = "0.2.0, 1.0"
 Roots = "0.8.3, 1.0, 2.0"