Mark invokers tests as non-tentative

See related spec PR whatwg/html#9841

Author: keithamus

html/semantics/the-button-element/command-and-commandfor/button-event-dispatch.tentative.html html/semantics/the-button-element/command-and-commandfor/button-event-dispatch.html

@@ -8,7 +8,7 @@
 <script src="/resources/idlharness.js"></script>
 
 <script>
-  idl_test(["command-and-commandfor.tentative"], ["html", "dom"], (idl_array) => {
+  idl_test(["command-and-commandfor"], ["html", "dom"], (idl_array) => {
     idl_array.add_objects({
       CommandEvent: ['new CommandEvent("invoke")'],
     });