Use SubmitEvent for submit event (microsoft#1105)

Author: saschanaz

baselines/dom.generated.d.ts

@@ -5350,7 +5350,7 @@ interface GlobalEventHandlersEventMap {
     "selectionchange": Event;
     "selectstart": Event;
     "stalled": Event;
-    "submit": Event;
+    "submit": SubmitEvent;
     "suspend": Event;
     "timeupdate": Event;
     "toggle": Event;
@@ -5605,7 +5605,7 @@ interface GlobalEventHandlers {
      * @param ev The event.
      */
     onstalled: ((this: GlobalEventHandlers, ev: Event) => any) | null;
-    onsubmit: ((this: GlobalEventHandlers, ev: Event) => any) | null;
+    onsubmit: ((this: GlobalEventHandlers, ev: SubmitEvent) => any) | null;
     /**
      * Occurs if the load operation has been intentionally halted.
      * @param ev The event.
@@ -17384,7 +17384,7 @@ declare var onselectstart: ((this: Window, ev: Event) => any) | null;
  * @param ev The event.
  */
 declare var onstalled: ((this: Window, ev: Event) => any) | null;
-declare var onsubmit: ((this: Window, ev: Event) => any) | null;
+declare var onsubmit: ((this: Window, ev: SubmitEvent) => any) | null;
 /**
  * Occurs if the load operation has been intentionally halted.
  * @param ev The event.

inputfiles/addedTypes.jsonc

@@ -168,6 +168,10 @@
                             "name": "securitypolicyviolation",
                             "type": "SecurityPolicyViolationEvent"
                         },
+                        {
+                            "name": "submit",
+                            "type": "SubmitEvent"
+                        },
                         {
                             "name": "dblclick",
                             "type": "MouseEvent"