fix platform

packages/zefyr/lib/src/widgets/common.dart

@@ -75,6 +75,9 @@ class _ZefyrLineState extends State<ZefyrLine> {
         case TargetPlatform.fuchsia:
           cursorColor = theme.cursorColor;
           break;
+        default:
+          cursorColor = theme.cursorColor;
+          break;
       }
 
       content = EditableBox(