`Iterators.countfrom(::Any, ::Any)` doesn't exist

[MarcMush]

Is there a reason why only Iterators.countfrom(::Number, ::Number) is defined ?

I wanted to do

using Dates
Iterators.countfrom(now(), Minute(15))

I know I can do the same with Numbers but I like this syntax
It doesn't look like it would be an issue to allow it:

julia/base/iterators.jl

Line 597 in 697e782

iterate(it::Count, state=it.start) = (state, state + it.step)

[MarcMush]

now():Minute(15):(now()+Day(1))

does work so it would make sense