Describe the bug
These options are surprisingly rejected when they contain a single word or a single quoted string.

Version(s) Affected
v0.2.0 - v0.4.0

To Reproduce
Steps to reproduce the behavior:

1. Set up a config file containing SshConfig hello or SshConfig "hi there" (or the same with SshOptions)
2. Attempt to qcp a file somewhere, you get this error:

Error: invalid type: found string "hi", expected a sequence for key `ssh_config` of host `some-host` at /home/wry/.qcp.conf (line 2)

Expected behavior
Config should be accepted and used appropriately (in this case, a warning that the given config file was not found).