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

src/NadekoBot/Common/Yml/UriConverter.cs

@@ -1,4 +1,5 @@
-using YamlDotNet.Core;
+#nullable disable
+using YamlDotNet.Core;
 using YamlDotNet.Core.Events;
 using YamlDotNet.Serialization;
 
@@ -21,4 +22,4 @@ public class UriConverter : IYamlTypeConverter
         var uri = (Uri)value;
         emitter.Emit(new Scalar(uri.ToString()));
     }
-}
+}