Add support for yAxis on chart exp/imp

compose/commands/exporter.go

@@ -651,6 +651,10 @@ func expCharts(charts types.ChartSet, modules types.ModuleSet) (o map[string]Cha
 				"renderer":   r.Renderer,
 			}
 
+			if r.YAxis != nil {
+				rOut["yAxis"] = r.YAxis
+			}
+
 			if r.ModuleID > 0 {
 				module := modules.FindByID(r.ModuleID)
 				rOut["module"] = makeHandleFromName(module.Name, module.Handle, "module-%d", module.ID)

compose/importer/chart.go

@@ -158,6 +158,10 @@ func (cImp *Chart) castConfigReports(chart *types.Chart, def interface{}) ([]*ty
 				r.Metrics = deinterfacer.ToSliceOfStringToInterfaceMap(val)
 			case "dimensions":
 				r.Dimensions = deinterfacer.ToSliceOfStringToInterfaceMap(val)
+			case "yAxis":
+				if YAxis, ok := deinterfacer.Simplify(val).(map[string]interface{}); ok {
+					r.YAxis = YAxis
+				}
 			case "renderer":
 				// @todo implement renderer decoding
 				// r.Renderer.Version