[IMP] blockdom: t-on supports synthetic and native event handler

Synthetic handler is a sort of event delegation that allows placing
only one listener on the document to improve performance. It is an opt-in option.

Native listener places the listener on the node itself.

src/component/handler.ts

@@ -1,7 +1,10 @@
+import { filterOutModifiersFromData } from "../blockdom/config";
+
 export function mainEventHandler(data: any, ev: Event) {
   if (typeof data === "function") {
     data(ev);
   } else {
+    data = filterOutModifiersFromData(data).data;
     const ctx = data[0];
     const method = data[1];
     const args = data[2] || [];