Make dependency_graph work with new ES6 class syntax.
Make dependency_graph work with new ES6 class syntax.

Silverwolf90/vexflow,Tails/vexflow,Tails/vexflow,aaronmars/vexflow,Huji/vexflow,Tails/vexflow,Silverwolf90/vexflow,Silverwolf90/vexflow,aaronmars/vexflow,Huji/vexflow,aaronmars/vexflow,Huji/vexflow