"encrypt" command will not work with secrets prefixed by "-" character

[alecspringel]

This issue may be better suited for the Cobra CLI library, but I figured it should be noted here as well 😃

Summary of the issue: Some OAuth implementations contain client IDs and secrets that begin with a "-" character. When running pixlet encrypt on a secret that begin with a "-", the character is confused for a flag.

How to reproduce: Running pixlet encrypt <app_name> -secret_that_starts_with_a_dash

Yields the response: Error: unknown shorthand flag: 's' in -secret_that_starts_with_a_dash

I was able to get around this by creating a new app which generated a new Client ID, but that may not always be an option.