New prompt option: if-no-arg

[iamturns]

This PR introduces a new option prompt: if-no-arg.

It's useful when you want to provide a default value for a prompt, but don't want to prompt if the argument is provided.

Example

"install-dependencies": {
    describe: "Install dependencies",
    type: "confirm",
    default: true,
    prompt: 'if-no-arg',
  },

If --install-dependencies argument is not provided, the question is prompted with a default value of true.

If --install-dependencies argument is provided, the question is not prompted.

[nanovazquez]

Some minor changes in the docs/comments + a change to pass the linter check.

[nanovazquez]

Hey @iamturns, this PR to your branch adds tests for this new prompt value, increasing the coverage. Could you please take a look and merge it? iamturns#1

[iamturns]

Very nice work @nanovazquez - all merged!

[nanovazquez]

🎉 This PR is included in version 2.1.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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