Fix a Union deprecation in univariate.jl

Author: IainNZ

src/univariate.jl

@@ -8,7 +8,7 @@ end
 kernel_dist(::Type{Normal},w::Real) = Normal(0.0,w)
 kernel_dist(::Type{Uniform},w::Real) = (s = 1.7320508075688772*w; Uniform(-s,s))
 
-typealias LocationScale Union(Laplace,Logistic,SymTriangularDist)
+typealias LocationScale @compat(Union{Laplace,Logistic,SymTriangularDist})
 kernel_dist{D}(::Type{D},w::Real) = (s = w/std(D(0.0,1.0)); D(0.0,s))