Make tests compatible with Email::Sender version >= 0.120000
Make tests compatible with Email::Sender version >= 0.120000

The behavior Email::Sender::Simple->default_transport->deliveries()
was apparently changed between version 0.110001 and 0.120000, so add
some logic to handle both versions.

While here, be sure to clear deliveries between test runs.

cfuhrman/log-fine,cfuhrman/log-fine