change locale code to 'zh-cn', there is error. about gantt-elastic

[neuronetio]

did you setup language properly?
https://github.com/neuronetio/gantt-elastic/wiki/Locale

paste your config here

[Lucouse]

this is my language settings

locale: {
          code: 'zh-cn',
          'Now': '今天',
          'X-Scale': '宽度',
          'Y-Scale': '高度',
          'Task list width': '任务列表宽度',
          'Before/After': 'Expand',
          'Display task list': '任务列表显示'
        }

---

i know the reason. dayjs is used in gantt-elastic, so i have to import the 'dayjs/locale/zh-cn' manually.
i solved the problem when i found that dayjs is used in gantt-elastic.
https://github.com/iamkun/dayjs/tree/35e268acf075256e526b72f0a537afe58b5af1cc

[neuronetio]

gantt should work without any import, so there may be a bug, i will check it later anyway