add option to not include suggestions for commands that previously terminated with non-zero exit code

[Eboubaker]

Is your feature request related to a problem? Please describe.

I'm always frustrated when this plugin suggests from a previously terminated command with non-zero exit code (when you do typing error, syntax error, forgot sudo, etc..)

Describe the solution you'd like

add option to not include suggestions for commands that previously terminated with non-zero exit code.

Describe alternatives you've considered

Additional context

[ericfreese]

See #424