Update index.tsx

src/components/col-sticky/index.tsx

@@ -1,5 +1,5 @@
 import { useRect } from '@vant/use'
-import { defineComponent } from 'vue'
+import { PropType, defineComponent } from 'vue'
 import styles from './index.module.less'
 import { useResizeObserver } from '@vueuse/core'