Comparisons fail between dimensionless quantities and unitless numbers

[ajkeller34]

julia> using Unitful

julia> 1u"μm/m" < 1
ERROR: MethodError: no method matching isless(::Unitful.Quantity{Int64,Unitful.Dimensions{()},Unitful.Units{(Unitful.Unit{:Meter}(-6,1//1),Unitful.Unit{:Meter}(0,-1//1)),Unitful.Dimensions{()}}}, ::Int64)
Closest candidates are:
  isless(::Char, ::Integer) at deprecated.jl:49
  isless(::AbstractFloat, ::Real) at operators.jl:42
  isless(::Real, ::Real) at operators.jl:75
  ...
 in <(::Unitful.Quantity{Int64,Unitful.Dimensions{()},Unitful.Units{(Unitful.Unit{:Meter}(-6,1//1),Unitful.Unit{:Meter}(0,-1//1)),Unitful.Dimensions{()}}}, ::Int64) at ./operators.jl:63