[Feature] Compression support in clients

[pkittenis]

Is your feature request related to a problem? Please describe.
Compression cannot be enabled in clients.
Compression is enabled in the underlying SSH libraries, but cannot be configured in parallel-ssh.

Describe the solution you'd like
Add an optional parameter to clients to enable compression.

Describe alternatives you've considered
N/A

Additional context
ParallelSSHClient(<..>, compress=True)