Fix 0.7 deprecations

[mauro3]

No description provided.

[sbromberger]

As of today's -nightly, the deprecations are now errors for

SimpleTraits.jl/src/SimpleTraits.jl

Lines 477 to 480 in b38ca92

	Base.start(::GenerateTypeVars) = 1
	Base.next(::GenerateTypeVars{:upcase}, state) = (Symbol("X$state"), state+1) # X1,..
	Base.next(::GenerateTypeVars{:lcase}, state) = (Symbol("x$state"), state+1) # x1,...
	Base.done(::GenerateTypeVars, state) = false

[sbromberger]

(is there a quick workaround for this? We're trying to keep up with 0.7/1.0 in LightGraphs.)

[mauro3]

I'm working on this and will hopefully push a fix and tag within the hour