numeric type not preserved in uconvert

[elehcim]

As pointed out by @islent in JuliaAstroSim/PhysicalParticles.jl#27 (comment)

julia> using Unitful, UnitfulAstro

julia> a = 1.0f0u"kpc/Gyr"
┌ Warning: Symbol Gyr was found in multiple registered unit modules.
│ We will use the one from UnitfulAstro.
└ @ Unitful E:\.julia\packages\Unitful\9janP\src\user.jl:589
1.0f0 kpc Gyr^-1

julia> b = uconvert(u"km/s", a)
0.9777922216807892 km s^-1

julia> typeof(a)
Quantity{Float32, 𝐋 𝐓^-1, Unitful.FreeUnits{(Gyr^-1, kpc), 𝐋 𝐓^-1, nothing}}

julia> typeof(b)
Quantity{Float64, 𝐋  𝐓 ^-1, Unitful.FreeUnits{(km, s^-1), 𝐋  𝐓 ^-1, nothing}

I'd like b to stay Float32

[islent]

That comes from Unitful. 🤣
PainterQubits/Unitful.jl#502

[mileslucas]

I'm going to close this since it is a Unitful issue, not specific to this repo. Feel free to open it again or move to a discussion for further discourse.