Can't create command with alias to default command

[domdomegg]

Issue Type

• Bug Report
• Feature Request
• Other

Expected

cli
  .command("something", "Do something")
  .alias("!")
  .action(async () => {
    console.log("Did something!");
  });

Should log 'Did something!' if you run cli something or cli

Actual

Only logs when running cli something

Possible Solutions

cac/src/CAC.ts

Lines 200 to 210 in abe662b

	if (shouldParse) {
	// Search the default command
	for (const command of this.commands) {
	if (command.name === '') {
	shouldParse = false
	const parsed = this.mri(argv.slice(2), command)
	this.setParsedInfo(parsed, command)
	this.emit(`command:!`, command)
	}
	}
	}

should use command.isDefaultCommand rather than the name.

We should also add documentation explaining the ! alias.

Info

• CAC version: 6.7.14
• Reproduction link: https://replit.com/@domdomegg/cac-151#index.js