TLS support is missing

[MP-Munich]

Could you please add TLS support?
Many devices no longer allow connections without TLS.

[marco-manfroni]

I use this library for most of my projects, but new third party servers that I have to connect require a TLS connection.
Is there a plan to integrate it shortly? I would like to avoid using another library.
Thank you

[jchristn]

@MP-Munich and @marco-manfroni are you using the client constructor with the URI or with the hostname, port, and ssl boolean flag? The constructed URI should be wss://... which supports TLS. Have you set ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls13; in your code?