Default to Float32 for grids on GPU?

[navidcy]

@glwagner should we change

FourierFlows.jl/src/CuFourierFlows.jl

Lines 5 to 7 in 796ed2d

	OneDGrid(dev::GPU, args...; kwargs...) = OneDGrid(args...; ArrayType=CuArray, kwargs...)
	TwoDGrid(dev::GPU, args...; kwargs...) = TwoDGrid(args...; ArrayType=CuArray, kwargs...)
	ThreeDGrid(dev::GPU, args...; kwargs...) = ThreeDGrid(args...; ArrayType=CuArray, kwargs...)

to

OneDGrid(dev::GPU, args...; kwargs...) = OneDGrid(args...; ArrayType=CuArray, T=Float32, kwargs...)
TwoDGrid(dev::GPU, args...; kwargs...) = TwoDGrid(args...; ArrayType=CuArray, T=Float32, kwargs...)
ThreeDGrid(dev::GPU, args...; kwargs...) = ThreeDGrid(args...; ArrayType=CuArray, T=Float32, kwargs...)

?