Set minimum of OrderedLogistic distribution to 1

The minimum of the OrderedLogistic function is supposed to be 1, not 0.
This is consistent with the documentation, and the behavior of the
distribution when using rand().

Author: Noricc

src/stdlib/distributions.jl

@@ -126,7 +126,7 @@ function OrderedLogistic(η, cutpoints::AbstractVector)
     return OrderedLogistic{typeof(η),typeof(cutpoints)}(η, cutpoints)
 end
 
-Base.minimum(d::OrderedLogistic) = 0
+Base.minimum(d::OrderedLogistic) = 1
 Base.maximum(d::OrderedLogistic) = length(d.cutpoints) + 1
 
 function Distributions.logpdf(d::OrderedLogistic, k::Real)