Fix command flag

[mrjoedang]

Fixes issue where command flags are being ignored when connecting to a session.

Before

Running the following would connect to the session but would ignore the command flag:

./sesh connect "~/Downloads" --command "nvim"

After

The --command flag is not ignored when using sesh connect. Running the same command above connects to the session and opens nvim:

./sesh connect "~/Downloads" --command "nvim"

[joshmedeski]

Good fix, thanks!