types(DatetimePicker): use tsx (#8181)

src/utils/validate/date.ts

@@ -1,8 +1,8 @@
 import { isNaN } from './number';
 
-export function isDate(val: Date): val is Date {
+export function isDate(val: unknown): val is Date {
   return (
     Object.prototype.toString.call(val) === '[object Date]' &&
-    !isNaN(val.getTime())
+    !isNaN((val as Date).getTime())
   );
 }