refactor(edges): use new edge as default, add simplebezier

src/components/Edges/index.ts

@@ -1,5 +1,5 @@
-export { default as BezierEdge } from './BezierEdge';
+export { default as SimpleBezierEdge } from './SimpleBezierEdge';
 export { default as SmoothStepEdge } from './SmoothStepEdge';
 export { default as StepEdge } from './StepEdge';
 export { default as StraightEdge } from './StraightEdge';
-export { default as UnrealBezierEdge } from './UnrealBezierEdge';
+export { default as BezierEdge } from './BezierEdge';