Diffractor's forward mode cannot differentiate a struct with extra type params

[YingboMa]

MWE:

julia> struct Goo{I,T}
           x::T
       end

julia> using Diffractor

julia> const var"'" = Diffractor.PrimeDerivativeFwd
Diffractor.PrimeDerivativeFwd

julia> goo(x) = Goo{Int,typeof(x)}(x).x
goo (generic function with 1 method)

julia> goo'(1)
ERROR: MethodError: no method matching apply_type(::Type{Goo}, ::Type{Int64}, ::Type{Int64})
Stacktrace:
  [1] ∂☆nomethd(args::Any)
    @ Diffractor ~/src/julia/Diffractor/src/stage1/recurse_fwd.jl:115
  [2] macro expansion
    @ ~/src/julia/Diffractor/src/stage1/recurse_fwd.jl:0 [inlined]
  [3] (::Diffractor.∂☆recurse{1})(::Diffractor.UniformBu, ::Diffractor.UniformBu, ::Diffractor.UniformBu, ::Diffractor.UniformBu)
    @ Diffractor ~/src/julia/Diffractor/src/stage1/recurse_fwd.jl:160
  [4] (::Diffractor.∂☆internal{1})(::Diffractor.UniformBu, ::Vararg{Diffractor.Ab)
    @ Diffractor ~/src/julia/Diffractor/src/stage1/forward.jl:115
  [5] (::Diffractor.∂☆{1})(::Diffractor.UniformBu, ::Vararg{Diffractor.Ab)
    @ Diffractor ~/src/julia/Diffractor/src/stage1/forward.jl:134
  [6] ∂☆recurse
    @ ./REPL[4]:1 [inlined]
  [7] (::Diffractor.∂☆recurse{1})(::Diffractor.UniformBu, ::Diffractor.TangentBu)
    @ Diffractor ~/src/julia/Diffractor/src/stage1/recurse_fwd.jl:0
  [8] (::Diffractor.∂☆internal{1})(::Diffractor.UniformBu, ::Vararg{Diffractor.Ab)
    @ Diffractor ~/src/julia/Diffractor/src/stage1/forward.jl:115
  [9] ∂☆
    @ ~/src/julia/Diffractor/src/stage1/forward.jl:134 [inlined]
 [10] (::Diffractor.PrimeDerivativeFwd{1, typeof(goo)})(x::Int64)
    @ Diffractor ~/src/julia/Diffractor/src/interface.jl:177
 [11] top-level scope
    @ REPL[5]:1

[Keno]

This works fine with JuliaDiff/ChainRules.jl#463.

[Keno]

Fixed by ChainRules bump.