Has Plots interface changed?

In Julia 1.2 with an unknown but presumably up-to-date version of Plots, I wrote

plot([cos sin])

to get cosine and sine plots from an adaptive plotter. Yesterday I upgraded to Julia 1.4 and now apparently Plots version 1.0.3 and this fails. I now must write

plot([cos, sin]) (note the comma).

Furthermore, I now must use the inconsistent form

plot([cos, sin], color = [:red :blue]).

Was I smoking something I wasn’t supposed to?