Add a couple of video playing props for greater control and manipulation of video playing

[khlling]

Add a couple of video playing props for greater control and manipulation of video playing.

• Add 'onPostProgress' prop which is a callback function that is called every progressUpdateInterval milliseconds with info about which position the media is currently playing. This prop is called directly after react-native-reanimated-player functions and relies on react-native-video onProgress
• Add 'onSeek' prop which is a callback function that is called when a seek completes.This prop is called directly after react-native-reanimated-player functions and relies on react-native-video onSeek
• Explicitly add 'children' prop so that child components can be added in between the video and the video player controls.

[khlling]

Thanks @alantoa!

[khlling]

@alantoa when you can, could you push out a new release?

[alantoa]

Hi @khlling , just released, now you can check it!

[khlling]

Hi @alantoa , thanks will check it out now :)