Removed unnecessary ES6 polyfill

Replaces use of Array.includes() with Array.indexOf

src/common/scripts/video.js

@@ -43,7 +43,8 @@ export const togglePictureInPicture = function(video) {
  * @param {function(HTMLVideoElement, boolean)} listener - an event listener to add
  */
 export const addPictureInPictureEventListener = function(listener) {
-  if (!eventListeners.includes(listener)) {
+  const index = eventListeners.indexOf(listener);
+  if (index == -1) {
     eventListeners.push(listener);
   }
 

src/safari-legacy/update.plist

@@ -10,7 +10,7 @@
 			<key>CFBundleShortVersionString</key>
 			<string>1.0.2</string>
 			<key>CFBundleVersion</key>
-			<string>199</string>
+			<string>200</string>
 			<key>Developer Identifier</key>
 			<string>BQ6Q24MF9X</string>
 			<key>URL</key>