Added support of tokio-rustls and tokio-native-tls

[Hartigan]

Hi

This pull request contains support of TLS with tokio-rustls and tokio-native-tls crates. I tested it with the CE version of aerospike from official docker image. CE version doesn't support TLS, but I used openssl for wrapping TCP socket into TLS:

socat openssl-listen:4000,reuseaddr,cert=example.server.pem,cafile=example.ca.crt,verify=0,openssl-min-proto-version=TLS1.2,fork,reuseaddr TCP4:localhost:3000

This setup working with aql and version from that pull request.