add curve-style visual style property
add curve-style visual style property

KonstantinShemyak/cytoscape.js,rlugojr/cytoscape.js,cytoscape/cytoscape.js,soomin-maeng/cytoscape.js,soomin-maeng/cytoscape.js,cytoscape/cytoscape.js,rlugojr/cytoscape.js,KonstantinShemyak/cytoscape.js