Ignore `Launchy::CommandNotFoundError` on deliver
Ignore `Launchy::CommandNotFoundError` on deliver

When Launchy runs dry run mode, its runner will detect executable command.
Ref: https://github.com/copiousfreetime/launchy/blob/v2.4.3/lib/launchy/detect/runner.rb#L58

It makes sense for Launchy. So letter_opener_web should avoid this error.

ProctorU/letter_opener_web,fgrehm/letter_opener_web,fgrehm/letter_opener_web,fgrehm/letter_opener_web,fgrehm/letter_opener_web,ProctorU/letter_opener_web,ProctorU/letter_opener_web,ProctorU/letter_opener_web