switched to proper Plotly Lib.extend

Author: monfera

src/traces/parcoords/parcoords.js

@@ -10,6 +10,7 @@
 
 var lineLayerMaker = require('./lines');
 var utils = require('./utils');
+var Lib = require('../../lib');
 var d3 = require('d3');
 
 function keyFun(d) {
@@ -116,7 +117,7 @@ module.exports = function(root, styledData, layout) {
     var tickDistance = styledData.tickdistance;
     var coloringDomainToUnitScale = makeDomainToUnitScale(styledData.line.color);
     var overdrag = 40;
-    var lines = utils.extend(styledData.lines, {
+    var lines = Lib.extendDeep(styledData.lines, {
         color: styledData.line.color.map(coloringDomainToUnitScale),
         overdrag: overdrag
     });

src/traces/parcoords/utils.js

@@ -121,12 +121,6 @@ module.exports = (function() {
 
         range: range,
 
-        extend: function extend(object, props) {
-            // this is a simple placeholder for a proper `extend` supplied by
-            // comprehensive library utilities
-            return Object.create(object, Object.getOwnPropertyDescriptors(props));
-        },
-
         d3OrdinalScaleSnap: function closestValue(scale, v) {
             var i, a, prevDiff, prevValue, diff;
             for(i = 0, a = scale.range(), prevDiff = Infinity, prevValue = a[0], diff; i < a.length; i++) {