Coefficients of complex variables created with a GenericModel are always Float64

[araujoms]

MWE:

using JuMP
model = GenericModel{Float32}()
@variable(model, x in ComplexPlane())
typeof(x)
typeof(Float32(1)*x)

In contrast, the real case works as expected:

using JuMP
model = GenericModel{Float32}()
@variable(model, x)
typeof(Float64(1)*x)
typeof(BigFloat(1)*x)