VariableDeclaration builder params order

In the [definition of VariableDeclaration](https://github.com/benjamn/ast-types/blob/master/def/core.js#L182) you have the first `kind` param and the second `declarations`, whereas [spec](https://developer.mozilla.org/en-US/docs/Mozilla/Projects/SpiderMonkey/Parser_API#Declarations) describes `declarations` as first and then `kind`. Esprima also prints `kind` as the last param, thogh it doesn’t matter as far it is object.
Is there some reason to keep exactly that order of params in builder?

Start with the VariableDeclaration definition in def/core.js at the linked line, then compare its builder parameter order with the Mozilla parser API and Esprima references in the issue. Done means determining whether the order should change or be retained and documenting or implementing the agreed result.

Written by the indexing model from the issue text.