#### Creates a reference node for the root object at the given path.
* With root: {a: {b: 'foo'}} and path: ['a', 'b'], the node will
reference 'foo' value of the a.b Object

* With root; {a: b: [null, 'bar']} and path: ['a', 'b', 1], the node
will reference 'bar' value of the a.b Array at index 1

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* root - Root getter/setter
* parent - Parent getter
* path - Path getter/setter
* key - Key getter/setter
* resolves - Resolves getter

Example

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const RefNode = require('@nhz.io/ref-node')
const root = {a: {b: 'foobar'}}
const node = new RefNode(root, ['a', 'b'])
console.log(node.value) // Prints 'foobar'
node.value = 'barfoo'
console.log(root.a.b) // Prints 'barfoo'
`

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