Missing ecommerce getter

[SassNinja]

Is your feature request related to a problem? Please describe.
Unfortunately the matomo javascript doesn't support promises or callbacks for the ecommerce actions.
(Further information: matomo-org/matomo#17756)

Since I need to wait until the order has been tracked, I'm trying to build a workaround by waiting until the untracked cart items are cleared (which occurs after successful order tracking)
However the problem is that this matomo-tracker doesn't provide the getter getEcommerceItems which is listed in the docs.

Describe the solution you'd like
I'd like the integration to provide the missing method getEcommerceItems

Describe alternatives you've considered
An alternative would be to do a PR in the matomo repo to add a callback in the trackOrder part.
However since this integration doesn't support everything that is listed in the docs, I'd start here.