Allow JuliaFormatter 0.12

Required for Atom.jl

Author: ChrisRackauckas

Project.toml

@@ -51,7 +51,7 @@ DiffRules = "0.1, 1.0"
 Distributions = "0.23, 0.24, 0.25"
 DocStringExtensions = "0.7, 0.8"
 IfElse = "0.1"
-JuliaFormatter = "0.13"
+JuliaFormatter = "0.12, 0.13"
 LabelledArrays = "1.3"
 Latexify = "0.11, 0.12, 0.13, 0.14, 0.15"
 LightGraphs = "1.3"