Some more type loosening

src/gauss-kronrod.jl

@@ -1,7 +1,7 @@
 # Gauss-Kronrod quadrature rule, via the QuadGK package, since Genz-Malik
 # rule does not handle the 1d case.  We will just use a fixed-order (7) G-K rule.
 
-struct GaussKronrod{T<:AbstractFloat}
+struct GaussKronrod{T<:Real}
     x::Vector{T}
     w::Vector{T}
     wg::Vector{T}
@@ -11,7 +11,7 @@ end
 # call QuadGK.kronrod every time.
 const gkcache = Dict{Type, GaussKronrod}()
 
-function GaussKronrod(::Type{T}) where {T<:AbstractFloat}
+function GaussKronrod(::Type{T}) where {T<:Real}
     haskey(gkcache, T) && return gkcache[T]::GaussKronrod{T}
     gkcache[T] = g = GaussKronrod{T}(QuadGK.kronrod(T,7)...)
     return g

src/genz-malik.jl

@@ -56,7 +56,7 @@ end
 to an `n`-dimensional Genz-Malik cubature rule over coordinates
 of type `T`.
 """
-struct GenzMalik{n,T<:AbstractFloat}
+struct GenzMalik{n,T<:Real}
     p::NTuple{4,Vector{SVector{n,T}}} # points for the last 4 G-M weights
     w::NTuple{5,T}  # weights for the 5 terms in the G-M rule
     w′::NTuple{4,T} # weights for the embedded lower-degree rule
@@ -72,7 +72,7 @@ const gmcache = Dict{Tuple{Int,Type}, GenzMalik}()
 
 Construct an n-dimensional Genz-Malik rule for coordinates of type `T`.
 """
-function GenzMalik(v::Val{n}, ::Type{T}=Float64) where {n, T<:AbstractFloat}
+function GenzMalik(v::Val{n}, ::Type{T}=Float64) where {n, T<:Real}
     haskey(gmcache, (n,T)) && return gmcache[n,T]::GenzMalik{n,T}
 
     n < 2 && throw(ArgumentError("invalid dimension $n: GenzMalik rule requires dimension > 2"))