Julia 0.6 use of UnitfulPlots' recipes

[goedman]

Hi Andrew,

Should the call to ustrip(val.) be replaced by ustrip.(val.) in UnitfulPlots.jl?

I've only seen the problem when I add units to the tick marks (which is discussed in #5 and I agree that a better approach is to extract the units and use them in the axes labels).

It's a simple change but I can make a PR if that's easier.

Regards,
Rob

[ajkeller34]

Closed by #9