Remove the callback option

[LitoMore]

Just deprecate the callback option as #85 (comment) mentioned.

It's a breaking change.

[sindresorhus]

You are not deprecating it, you are removing it.

[sindresorhus]

And you missed this point:

and add a updateNotifier.check() method that returns a Promise for the update.

[LitoMore]

@sindresorhus The previous code only does checkNpm() when the callback option is present, so I have not idea how to refactor this part.

and add a updateNotifier.check() method that returns a Promise for the update.

We already have the updateNotifier.checkNpm(), we could use the updateNotifier.checkNpm() directly to get the version information.

[sindresorhus]

We already have the updateNotifier.checkNpm(), we could use the updateNotifier.checkNpm() directly to get the version information.

Yes, but I think it needs a better name. Maybe checkImmediately() or something better. And it needs to be documented.

[LitoMore]

Yes, but I think it needs a better name. Maybe checkImmediately() or something better. And it needs to be documented.

This method is doing something about get some information. Maybe we could name this method getSemverDiff()?

[sindresorhus]

I don't like the name getSemverDiff(). It's not clear what it does or its purpose, it's also not accurate as the return value is not just the diff.

[LitoMore]

@sindresorhus Updated

[sindresorhus]

Can you also fix the merge conflict?

[LitoMore]

Can you also fix the merge conflict?

Sure.