3.5.8

• fix: combo edge problem, issues #1722;
• feat: adjacency matrix algorithm;
• feat: Floyd Warshall shortest path algorithm;
• feat: built-in arrows;
• feat: built-in markers;
• fix: force layout with addItem and relayout;
• fix: create combo with parentId problem;
• feat: allow user to configure the pixelRatio for Canvas;
• chore: update G to resolve the blur canvas problem.