增加LineChart和BarChart同时对Line、Bar类型Serie的支持，实现折线图和柱状图组合

Scripts/UI/Utility/ChartHelper.cs

@@ -504,7 +504,7 @@ namespace XCharts
         }
 
         public static void GetBezierList(ref List<Vector3> posList, VertexHelper vh, Vector3 sp, Vector3 ep,
-            Vector3 lsp, Vector3 nep, float lineWidth, bool fine, float k = 2.0f)
+            Vector3 lsp, Vector3 nep, bool fine, float k = 2.0f)
         {
             float dist = Mathf.Abs(sp.x - ep.x);
             Vector3 cp1, cp2;