Node version dependency: stream error on node v12.16.3 on nodehaystack@2.0.3

[Mikito Iwamasa]

I have just installed nodehaystac on node v12.16.3. After commenting out to load TestDataset, I have tried:
”http://localhost:3000/read?filter=site”

following system error occured:

TypeError: Cannot read property 'call' of undefined
at new ReadableStream (C:\…\nodehaystack\io\Streams.js:16:17)

in node v6.17.1, it does not happen.