Fix serverConnect regtest issue

[tkclough]

I've been trying to use the CLI with regtest. The server localhost { s: 50002 } is selected, and await ecl.connect() works (so docker is running), but await ecl.server_version('3.0.5', '1.1') seems to be the source of the error. It's hidden a bit by the fact that the exception is caught and the loop just continues, so the error returned to the commit function in bitname-cli.ts is "No valid servers". I haven't been able to find the documentation on ElectrumClient.server_version, so I'm not sure why it's failing.

[colatkinson]

Hm, is the docker container running? What is the result of await ecl.server_version('3.0.5', '1.1')?