Neither `promote_sys_size_add` nor `r_promote` is defined in `Base` now

[KDr2]

Neither promote_sys_size_add nor r_promote is defined in Base now, but
https://github.com/JuliaGraphics/ColorVectorSpace.jl/blob/master/src/ColorVectorSpace.jl#L56 still tries to refer to them, leads to a loading error.

[juliohm]

Yes, this is relevant in Julia v0.7. It would nice to have it fixed in master.

I have packages that I am trying to port that depend on it.

[juliohm]

Could you please tag a new release? It seems the issue was addressed. Thank you @RalphAS

[timholy]

Done