remove only the indices, not the square brackets

[Dakuan]

The {indices: false} feature isn't really doing what you would expect from the API. It's removing both the index number and the square brackets. This is a shame as the square brackets are expected to be there by a great many web technologies including PHP and Ruby On Rails.

[nlf]

This would be a breaking change, instead let's add a new option brackets that will enable or disable brackets when indices === false and default it to false, that way the old behavior remains but can be explicitly overridden.

[Dakuan]

@nlf had another suggestion: #46

[nlf]

Superseded by #70, closing this