Small CLI fixes

[od0]

Was getting errors like these on a few of the CLI commands and took a stab at fixing them. Just a little update that was needed with #55 I believe.

Would be nice to have the API mismatch be caught at compile time but not sure off top of head the best way to do that.

╔ ~/code/serval/serval-mesh/ [smolfix*]
╚ serval node-status
Error: reqwest::Error: error decoding response body: EOF while parsing a value at line 1 column 0

Caused by:
    0: error decoding response body: EOF while parsing a value at line 1 column 0
    1: EOF while parsing a value at line 1 column 0