Fix libmpv API changes

src/Native/libmpv.cs

@@ -101,21 +101,15 @@ public class libmpv
         MPV_EVENT_START_FILE = 6,
         MPV_EVENT_END_FILE = 7,
         MPV_EVENT_FILE_LOADED = 8,
-        MPV_EVENT_TRACKS_CHANGED = 9,
-        MPV_EVENT_TRACK_SWITCHED = 10,
-        MPV_EVENT_IDLE = 11,
-        MPV_EVENT_PAUSE = 12,
-        MPV_EVENT_UNPAUSE = 13,
+        MPV_EVENT_IDLE = 11, //deprecated in mpv
         MPV_EVENT_TICK = 14,
         MPV_EVENT_SCRIPT_INPUT_DISPATCH = 15,
         MPV_EVENT_CLIENT_MESSAGE = 16,
         MPV_EVENT_VIDEO_RECONFIG = 17,
         MPV_EVENT_AUDIO_RECONFIG = 18,
-        MPV_EVENT_METADATA_UPDATE = 19,
         MPV_EVENT_SEEK = 20,
         MPV_EVENT_PLAYBACK_RESTART = 21,
         MPV_EVENT_PROPERTY_CHANGE = 22,
-        MPV_EVENT_CHAPTER_CHANGE = 23,
         MPV_EVENT_QUEUE_OVERFLOW = 24,
         MPV_EVENT_HOOK = 25
     }