Path: add bracketNotation option

[Emiyaaaaa]

closed #921

we can change default style on V5 if need.

[Emiyaaaaa]

I notice that Get can accept a 'mixed' path like 0[0].0 in addition to these two styles. so we should add a new style more, or just make Paths output all style?

[sindresorhus]

I notice that Get can accept a 'mixed' path like 0[0].0 in addition to these two styles. so we should add a new style more, or just make Paths output all style?

Neither. It doesn't make sense to support such a mixed style.