message: fix(devtools): show date type property value in preview
  Values of Date properties were not shown in the preview. It was formatted to a simple string thus not giving valuable info to the developer.
  PR Close
diff: @@ -62,7 +62,12 @@ const typeToDescriptorPreview: Formatter<string> = {
  [PropType.Object]: (prop: any) => (getKeys(prop).length > 0 ? '{...}' : '{}'),
  [PropType.Symbol]: (_: any) => 'Symbol()',
  [PropType.Undefined]: (_: any) => 'undefined',
  - [PropType.Date]: (_: any) => 'Date()',
  + [PropType.Date]: (prop: any) => {
  + if (prop instanceof Date) {
  + return `Date(${new Date(prop).toISOString()})`;
  + }
  + return prop;
  + },
  [PropType.Unknown]: (_: any) => 'unknown',
  };
  @@ -87,7 +92,7 @@ const shallowPropTypeToTreeMetaData = {
  expandable: false,
  },
  [PropType.Date]: {
  - editable: true,
  + editable: false,
  expandable: false,
  },
  [PropType.Null]: {
  