NativeScript 7+ support not working

Getting the following error on ns core 8.0.3 when searching for printers:

```
(file:///data/data/no.okam.store/files/app/vendor.js:84383:43)
at StarPrinter.searchPrinters(file:///data/data/no.okam.store/files/app/vendor.js:84382:16)
at loadPrinters(file:///data/data/no.okam.store/files/app/bundle.js:6878:24)
at invokeWithErrorHandling(file:///data/data/no.okam.store/files/app/vendor.js:90827:26)
at invoker(file:///data/data/no.okam.store/files/app/vendor.js:91484:14)
at _executeCallback(file:///data/data/no.okam.store/files/app/vendor.js:45898:27)
at TapAndDoubleTapGestureListenerImpl._handleSingleTap(file:///data/data/no.okam.store/files/app/vendor.js:45641:17)
at TapAndDoubleTapGestureListenerImpl.onSingleTapUp(file:///data/data/no.okam.store/files/app/vendor.js:45610:14)
at androidOnTouchEvent(file:///data/data/no.okam.store/files/app/vendor.js:45832:41)
at (file:///data/data/no.okam.store/files/app/vendor.js:39308:25)
at handleGestureTouch(file:///data/data/no.okam.store/files/app/vendor.js:39307:18)
at TouchListenerImpl.onTouch(file:///data/data/no.okam.store/files/app/vendor.js:39038:15)
```

This worked before updating from ns 6.5. I have `"nativescript-star-printer": "^4.0.0` installed

Reproduce printer searching with NativeScript 7+ or 8.0.3 and the reported nativescript-star-printer 4.0.0 setup. Start at the StarPrinter.searchPrinters call shown in the stack trace, compare behavior with NativeScript 6.5, and determine the compatibility failure. Done means printer discovery works on the newer NativeScript version without the reported error.

Written by the indexing model from the issue text.