prefer-shorthand rule should handle differently-named props

[MitchLillie]

In #10 this example was put forward about triggering false positives for the prefer-object rule:

const mapDispatchToProps = dispatch => ({
  onDoSomething: () => dispatch(toSomethingElse()),
});

That seems to have been fixed, however I'm wondering if this instance should fail the prefer-shorthand rule. Because this could be refactored to:

const mapDispatchToProps = {
  onDoSomething: toSomethingElse
};

Any thoughts on this? Thanks for a great lib btw :)

[DianaSuvorova]

@MitchLillie , you are not wrong :) Thanks for pointing this out. Created a PR to fix it.