Make a dart library for firebase-unit-testing

[prggTheProgrammer]

So there is this library called firebase-unit-testing which is very nice to test things like firestore and storage rules. Because I am making my app with flutter, I prefer to write these tests in dart instead of JavaScript. The problem is that this library is only available for node (JavaScript). Would it be possible to make a flutter library for this.
The web part shouldn't be hard, because of js interop. So I think it is best to start with a web-only version of firebase-unit-testing so that we could start making tests in dart and then later add support for other platforms.