add classList to get transitions working

examples/index_ie11.html

@@ -18,15 +18,10 @@
             .ease-out { transition-timing-function: cubic-bezier(0, 0, 0.2, 1); }
     </style>
 
-    <script
-        src="https://polyfill.io/v3/polyfill.js?features=MutationObserver%2CArray.from%2CArray.prototype.forEach%2CMap%2CSet%2CArray.prototype.includes%2CString.prototype.includes%2CPromise%2CNodeList.prototype.forEach%2CObject.values%2CReflect%2CReflect.set%2CString.prototype.startsWith%2CArray.prototype.find%2CArray.prototype.findIndex%2CElement.prototype.closest%2CElement.prototype.remove%2CCustomEvent">
-    </script>
+    <script src="https://polyfill.io/v3/polyfill.js?features=MutationObserver%2CArray.from%2CArray.prototype.forEach%2CMap%2CSet%2CArray.prototype.includes%2CString.prototype.includes%2CPromise%2CNodeList.prototype.forEach%2CObject.values%2CReflect%2CReflect.set%2CString.prototype.startsWith%2CArray.prototype.find%2CArray.prototype.findIndex%2CElement.prototype.closest%2CElement.prototype.remove%2CCustomEvent%2CElement.prototype.classList"></script>
     <script src="https://unpkg.com/shim-selected-options" async></script>
     <script src="https://cdn.jsdelivr.net/npm/proxy-polyfill@0.3.0/proxy.min.js"></script>
 
-
-    </script>
-
     <script src="/dist/alpine-ie11.js"></script>
     <!--
     <script src="https://cdn.jsdelivr.net/gh/alpinejs/alpine@v0.4.0/dist/project-x.js" defer></script>