NadekoBot.Extensions should now be fully annotated with nullable reference types as well as many classes from NadekoBot.Common

src/NadekoBot/Modules/Music/Common/Impl/CachableTrackData.cs

@@ -1,4 +1,5 @@
-using System.Text.Json.Serialization;
+#nullable disable
+using System.Text.Json.Serialization;
 
 namespace NadekoBot.Modules.Music;
 
@@ -12,4 +13,4 @@ public sealed class CachableTrackData : ICachableTrackData
     [JsonIgnore]
     public TimeSpan Duration => TimeSpan.FromMilliseconds(TotalDurationMs);
     public MusicPlatform Platform { get; set; }
-}
+}