setting name introduces inconsistency

[rockitbaby]

as childKeys are not updated

example:

var oco = require('opencolor')

const tree = oco.parse(`
mightBeRed: #EF665F
subtleYellow: #D8E096
brokenBlue: #21BECF
reducedBlue: #1797A6
`)
tree.traverseTree(false, (entry) => {
  entry.name = entry.name.replace('mightBeRed', 'brightRed')
})

var ocoString = oco.render(tree);

console.log(ocoString);
/*
prints
brightRed: #EF665F
subtleYellow: #D8E096
brokenBlue: #21BECF
reducedBlue: #1797A6
*/

console.log(tree.get('mightBeRed').hexcolor()) // defined

console.log(tree.get('brightRed').hexcolor())

// throws TypeError: Cannot read property 'hexcolor' of undefined