Repository.getReferenceNames returns arrayReference, not arrayString #1707

System information

• node version: v12.4.0
• npm or yarn version: 6.4.1
• OS/version/architecture: macOS Mojave
• Applicable nodegit version: v0.25.0-alpha.16

additional info: testing in electron 6 beta

node -v
yarn -v
node -e "console.log(process.platform)"
node -e "console.log(require('os').release())"
node -e "console.log(console.log(process.arch))"

v12.4.0
1.16.0
darwin
18.6.0
x64

Repository#getReferenceNames is documented as returning an array of strings, however in v0.25.0-alpha.16, I am seeing it return an array of Reference objects.

To reproduce the issue:

var repo = await nodegit.Repository.open(pathToRepo)
var refNames = await repo.getReferenceNames(nodegit.Reference.TYPE.LISTALL)
console.log(refNames[0]) //=> Reference {}
console.log(refNames[0].name()) //=> string