Reintroduce e0d33c9e18

https://github.com/MoOx/pjax/commit/e0d33c9e18ed542cd22c5cab74ae8c061982
2e22

src/scripts/lib/is-supported.js

@@ -4,5 +4,5 @@ module.exports = function() {
     window.history.pushState &&
     window.history.replaceState &&
     // pushState isn’t reliable on iOS until 5.
-    !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]|WebApps\/.+CFNetwork)/)
+    !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
 }