v3.0.0

[franciscogouveia]

New feature:

• Match between two fields (see issue Match between fields #21)

Breaking change:

• Method get from DataRetrieverRouter returns a Promise instead of accepting a callback

Before:

dataRetrieverRouter.get('credentials:username', (err, result) => {
    ...
});

After:

dataRetrieverRouter.get('credentials:username')
.then((result) => {...})
.catch((err) => {...});