Fix bugs

Author: ymtoo

src/AlphaStableDistributions.jl

@@ -250,7 +250,7 @@ function Distributions.fit(::Type{<:SymmetricAlphaStable}, x)
     if α < 0.5
         α = 0.5
     end
-    return AlphaStable(α=α, β=zero(α), scale=c, location=oftype(α, δ))
+    return SymmetricAlphaStable(α=α, scale=c, location=oftype(α, δ))
 end
 
 """

test/runtests.jl

@@ -28,7 +28,7 @@ using Test, Random, Distributions
         xcauchy = rand(Cauchy(3.0, 4.0), 96000)
         d = fit(stabletype, xcauchy)
         @test d.α ≈ 1 rtol=0.2
-        @test d.β ≈ 0 atol=0.2
+        stabletype != SymmetricAlphaStable && @test d.β ≈ 0 atol=0.2
         @test d.scale ≈ 4 rtol=0.2
         @test d.location ≈ 3 rtol=0.1
     end