fix: return a cancel flag if a user cancels a prompt

[Norviah]

issue

When executing Argument.runSeparate, provided arguments are pushed into an array, but if a user provides an incorrect argument type and cancels the prompt, a cancel Flag is generated but it's pushed into the array. Since the flag is in an Array, Argument.isShortCircuit returns false and the command executes, even though the user cancelled.

example

If the args array for a command is:

// command aliases: numbers
[
  {
    id: 'amount',
    match: 'separate',
    type: 'number',
    prompt: { start: 'please provide a valid number.', retry: 'please provide a valid number to use.' },
  }
]

and you execute the command with:

!numbers not_a_number1 not_a_number2

As the arguments aren't numbers, the user will be prompted to provide a valid argument for each invalid argument. So they're prompted to provide a number for not_a_number1, and if they cancel, the client will respond with the cancel text, and then respond with the retry text to provide a valid argument for not_a_number2, and if the user enters cancel again, the command executes with the args object as:

{ amount: [ Flag { type: 'cancel' }, Flag { type: 'cancel' } ] }

solution

To fix this, Argument.runSeparate asks the user for a valid argument, and if the user cancels, the method returns the flag, otherwise, the response is pushed into the array.

This allows Argument.isShortCircuit to successfully determine if the given flag is a cancel flag.

[1Computer1]

Could you see if this fixes #97?

[Norviah]

Could you see if this fixes #97?

Yup, it does.