i18n: replace __() by _n()

HI!

Could you replace one translation string:

=$ diff inc/services/wp-cli-commands/class-wp-cli-dev-command.php
120c120
< 				_n( '%d option deleted.','%d options deleted.', $deleted_count, 'simple-history' ),
---
> 				__( '%d options deleted.', 'simple-history' ),

Thank you in advance!

Marcin