[1/4] handleTechSeeked_ is not a function

1/4 compatibility fix VideoJs 7+

Error after switching quality
> VIDEOJS: ERROR: TypeError: player.play(...).handleTechSeeked_ is not a function at Player. (videojs-resolution-switcher.js:184)
This is probably due to the exclusion of the flash from the kernel.
https://blog.videojs.com/video-js-removes-flash-from-core-player/

kmoskwiak#129 (comment)

lib/videojs-resolution-switcher.js

@@ -178,10 +178,8 @@
           .setSourcesSanitized(sources, label, customSourcePicker || settings.customSourcePicker)
           .one(handleSeekEvent, function() {
             player.currentTime(currentTime);
-            player.handleTechSeeked_();
             if(!isPaused){
-              // Start playing and hide loadingSpinner (flash issue ?)
-              player.play().handleTechSeeked_();
+              player.play();
             }
             player.trigger('resolutionchange');
           });