connect method
Implementation
Future<bool> connect() async {
bool result = false;
try {
info = await _relayInfoProvider.get(url);
// Relay must support NIP-15 and NIP-20
if (info.nips.contains(15) && info.nips.contains(20)) {
await _ws.connect();
result = true;
}
} catch (e) {
log(e.toString());
}
return result;
}