fixed promotion

Author: Qfl3x

src/componentarray.jl

@@ -363,6 +363,6 @@ ComponentVector{Float64}(a = 1.2, h = 4.0, b = 2.3)
 Base.merge(ca::ComponentVector) = ca
 function Base.merge(ca1::ComponentVector{T1}, ca2::ComponentVector{T2}) where {T1, T2}
     promoted_ca1 = ComponentVector{promot_type(T1, T2)}(ca1)
-    ComponentVector(ca1; ca2...)
+    ComponentVector(promoted_ca1; ca2...)
 end
 Base.merge(ca1::ComponentVector, ca2::ComponentVector, cs::ComponentVector) = merge(merge(ca1,ca2), others...)