feat: use vue-flatpickr-component for vue3

package.json

@@ -32,6 +32,7 @@
     "vue-advanced-cropper": "1.8.2",
     "vue-drag-resize": "1.5.4",
     "vue-easymde": "1.4.0",
+    "vue-flatpickr-component": "9.0.4",
     "vue-i18n": "8.26.3",
     "vue-shortkey": "3.1.7",
     "vuedraggable": "2.24.3",
@@ -68,7 +69,6 @@
     "typescript": "4.4.3",
     "vite": "2.6.1",
     "vite-plugin-pwa": "0.11.2",
-    "vue-flatpickr-component": "8.1.7",
     "vue-notification": "1.3.20",
     "vue-router": "3.5.2",
     "wait-on": "6.0.0",