fix(pat validation): Fix release 7.1.0.

The event-submitter-polyfill package isn't universally built.
Let's use our new core/polyfills.js module instead and fix the previous release.

Author: thet

src/pat/validation/validation.js

@@ -1,6 +1,6 @@
 // Patterns validate - Form vlidation
 import "regenerator-runtime/runtime"; // needed for ``await`` support
-import "event-submitter-polyfill"; // SubmitEvent.submitter for Safari < 15.4 and jsDOM
+import "../../core/polyfills"; // SubmitEvent.submitter for Safari < 15.4 and jsDOM
 import $ from "jquery";
 import Base from "../../core/base";
 import Parser from "../../core/parser";