fix: update types for defaultValue

[Sadzurami]

Problem

Wrong typings for defaultValue
ref: #2236

Solution

Force defaultValue to any type.
Commander actually don't check types at code (except undefined) when use value.

We see that the tests pass successfully with types other then defined now.

commander.js/tests/argument.custom-processing.test.js

Lines 52 to 62 in 4e87829

	test('when default value is defined (without custom processing) and argument not specified with action handler then action argument is default value', () => {
	const defaultValue = 1;
	let actionValue;
	const program = new commander.Command();
	program.argument('[n]', 'number', defaultValue).action((arg) => {
	actionValue = arg;
	});
	program.parse([], { from: 'user' });
	expect(actionValue).toEqual(defaultValue);
	expect(program.processedArgs).toEqual([defaultValue]);
	});

[shadowspawn]

I am aware that the JavaScript allows any type, but we are stricter in the TypeScript.

See similar closed PR #1792

And the Pull Request that removed multiple uses of any including for the .option() default value: #1119