Hello,

I would like to share an issue that I found while I was trying to copy and rename a file which destination is the same as its current folder. It worked fine in v2.0.1.

CpyError: Refusing to copy to itself

I have tried to modify the code but it is very complex to understand where exactly renaming function must be executed. However, I have written a test to show you the error:

// test.js
test('rename at the same directory', async t => {
	fs.mkdirSync(t.context.tmp);
	fs.mkdirSync(path.join(t.context.tmp, 'dest'));
	fs.writeFileSync(path.join(t.context.tmp, 'hello.js'), 'console.log("hello");');

	await execa('./cli.js', [path.join(t.context.tmp, 'hello.js'), path.join(t.context.tmp, './'), '--rename=file-renamed.js']);

	t.is(read(t.context.tmp, 'file-renamed.js'), 'console.log("hello");');
});

 ✘ [fail]: rename to the same directory Rejected promise returned by test

CpyError: Refusing to copy to itself: `/private/var/folders/7g/nqj3y3v55jdddlg604cf973h0000gp/T/b60e1889-1101-48ae-9d08-9075e8881508/hello.js`

As I said, I would have like to open a PR but I could not find a proper solution. I hope you can find it.

Thank you!