fix iterator methods on useSubmissions

Author: ryansolid

.changeset/good-items-sparkle.md

@@ -0,0 +1,5 @@
+---
+"@solidjs/router": patch
+---
+
+fix iterator methods on useSubmissions

src/data/action.ts

@@ -31,6 +31,9 @@ export function useSubmissions<T extends Array<any>, U>(
       if (property === $TRACK) return subs();
       if (property === "pending") return subs().some(sub => !sub.result);
       return subs()[property as any];
+    },
+    has(_, property) {
+      return property in subs();
     }
   });
 }