Add option to override MinTLS version

[xoxys]

Hi @xoxys 👋🏼

Yeah, there was another report about TLS1.3 in #657. I think it make sense to add min_tls argument to the provider's arguments for setting up the min TLS version, with keeping 1.3 as the default.

A PR would be awesome! ❤️

Originally posted by @bpg in #920 (comment)