fix: $data使用下标访问其中属性

pages/template/calendar/calendar.uvue

@@ -59,8 +59,9 @@ export default {
   },
   created () { },
   onReady () {
-    this.weeks = this.$data.$calendar.getWeeks()
-    this.timeData = this.$data.$calendar.getDateInfo()
+    const calendar = this.$data['$calendar'] as Calendar
+    this.weeks = calendar.getWeeks()
+    this.timeData = calendar.getDateInfo()
     // 绘制日历头部
     this.drawHeader()
     this.drawWeek(this.weeks, '')