revert type complaint, which is opposite from previous suggestion, which 8-S

src/views/ProjectViewView.vue

@@ -625,7 +625,7 @@ export default class ProjectViewView extends Vue {
   }
 
   openOfferDialog() {
-    (this.$refs.customOfferDialog as typeof OfferDialog).open();
+    (this.$refs.customOfferDialog as OfferDialog).open();
   }
 }
 </script>