Adds onPlaybackRateChange to README

README.md

@@ -303,6 +303,7 @@ var styles = StyleSheet.create({
 * [onLoad](#onload)
 * [onLoadStart](#onloadstart)
 * [onPictureInPictureStatusChanged](#onpictureinpicturestatuschanged)
+* [onPlaybackRateChange](#onplaybackratechange)
 * [onProgress](#onprogress)
 * [onSeek](#onseek)
 * [onRestoreUserInterfaceForPictureInPictureStop](#onrestoreuserinterfaceforpictureinpicturestop)
@@ -969,6 +970,23 @@ isActive: true
 
 Platforms:  iOS
 
+#### onPlaybackRateChange
+Callback function that is called when the rate of playback changes - either paused or starts/resumes.
+
+Property | Type | Description
+--- | --- | ---
+playbackRate | number | 1 if playback is ongoing and 0 otherwise
+
+Example:
+```
+{
+  playbackRate: 0,
+}
+```
+
+Platforms: all
+
+
 #### onProgress
 Callback function that is called every progressUpdateInterval seconds with info about which position the media is currently playing.