v2.0.0-beta.2

What's new

• iOS now uses YoutubePlayer-in-WKWebView as a Cocoapods native dependency. This is a fork of the original Google library that upgraded to a WebKit WebView and seems to be well maintained. Functionality and behaviour SHOULD remain similar.
• Android implements a mechanism that periodically refreshes the native players' controls (c9a0c38), so they always display correct. (#362, #354, #349, #131)

Breaking Changes

• videosIndex(), currentTime(), and duration() were renamed to getVideosIndex(), getCurrentTime(), and getDuration()
• onProgress event (iOS) doe's not return e.duration anymore, use getDuration() to get the duration of the currently playing video