Get all city data

```javascript WXAPI.cityV2() ``` ```json { "code": 0, "data": [ { "firstLetter": "s", "id": "110100000000", "jianpin": "sxq", "level": 2, "name": "Beijing City", "nameEn": "Beijing", "pid": "110000000000", "pinyin": "shixiaqu" }, { "cxfldm": "", "firstLetter": "s", "id": "120100000000", "jianpin": "sxq", "level": 2, "name": "Tianjin City", "nameEn": "Tianjin", "pid": "120000000000", "pinyin": "shixiaqu" }, { "firstLetter": "s", "id": "130100000000", "jianpin": "sjzs", "level": 2, "name": "Shijiazhuang City", "nameEn": "Shijiazhuang", "pid": "130000000000", "pinyin": "shijiazhuangshi" } ], "msg": "success" } ```