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

src/NadekoBot/Services/Impl/RemoteGrpcCoordinator.cs

@@ -1,4 +1,5 @@
-using Grpc.Core;
+#nullable disable
+using Grpc.Core;
 using NadekoBot.Common.ModuleBehaviors;
 using NadekoBot.Coordinator;
 
@@ -129,4 +130,4 @@ public class RemoteGrpcCoordinator : ICoordinator, IReadyExecutor
             ConnState.Connected => ConnectionState.Connected,
             _ => ConnectionState.Disconnected
         };
-}
+}