no MatomoTracker.matomoObserver,

[OpenSphereSoftware]

Describe the bug In your migration guide on pub.dev you write for 4.0.0 that we have to set the MatomoTracker.matomoObserver, But it is not existing :D

To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[TesteurManiak]

The example project is quite explicit https://github.com/Floating-Dartists/matomo-tracker/blob/main/example/lib/main.dart#L45