comet validator-set command - offline mode error

Node version - 1.0.1

When attempting to use command `akash comet validator-set` the following offline mode error occurs.

```
akash comet validator-set
Error: no RPC client is defined in offline mode
```

```
akash comet validator-set --node https://rpc.akashnet.net:443
Error: no RPC client is defined in offline mode
```