fix 3d calendar attributes

Author: alexcjohnson

src/traces/mesh3d/attributes.js

@@ -37,6 +37,9 @@ module.exports = {
             'jointly represent the X, Y and Z coordinates of the nth vertex.'
         ].join(' ')
     },
+    xcalendar: surfaceAtts.xcalendar,
+    ycalendar: surfaceAtts.ycalendar,
+    zcalendar: surfaceAtts.zcalendar,
 
     i: {
         valType: 'data_array',

src/traces/scatter3d/attributes.js

@@ -67,7 +67,9 @@ module.exports = {
     },
     xcalendar: scatterAttrs.xcalendar,
     ycalendar: scatterAttrs.ycalendar,
-    zcalendar: scatterAttrs.zcalendar,
+    zcalendar: extendFlat({}, scatterAttrs.xcalendar, {
+        description: 'Sets the calendar system to use with `z` date data'
+    }),
 
     text: extendFlat({}, scatterAttrs.text, {
         description: [

src/traces/surface/attributes.js

@@ -112,7 +112,9 @@ module.exports = {
     },
     xcalendar: scatterAttrs.xcalendar,
     ycalendar: scatterAttrs.ycalendar,
-    zcalendar: scatterAttrs.zcalendar,
+    zcalendar: extendFlat({}, scatterAttrs.xcalendar, {
+        description: 'Sets the calendar system to use with `z` date data'
+    }),
 
     text: {
         valType: 'data_array',