chore: update package dependencies to latest versions across projects - #12

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-dotnet@v4, dorny/test-reporter@v1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Nullability of reference types in type of parameter 'sender' of 'void NetClient.HandleReadWrite(object sender, SocketAsyncEventArgs args)' doesn't match the target delegate 'EventHandler<SocketAsyncEventArgs>' (possibly because of nullability attributes).

Possible null reference argument for parameter 'socket' in 'void NetClient.Connect(Socket socket, int bufferSize = 1024)'.

Converting null literal or possible null value to non-nullable type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Nullability of reference types in type of parameter 'sender' of 'void NetServer.ProcessAccept(object sender, SocketAsyncEventArgs e)' doesn't match the target delegate 'EventHandler<SocketAsyncEventArgs>' (possibly because of nullability attributes).