getVisibleRegion throws [deprecated] and app stops working with ionic-native 4.0.1 and google maps plugin v2

[kuzman]

I'm submitting a ... (check one with "x")
[x] bug report
[ ] feature request

Current behavior:
After ugrade to ionic-native 4.0.1 and the v2 of the google maps plugin, the getVisibleRegion function from the google maps plugin throws in cosole: console.log: [deprecated] getVisibleRegion() is changed. Please check out the https://goo.gl/yHstHQ
The app should continue to work, but is doesn't start. If you follow the link in the console log, you can see that there are changes in thethe getVisibleRegionfunction.
Expected behavior:
before updating i was using the latest 3.14.0 ionic-native library and the 1.4.3 version of the google maps plugin and everything worked OK
Steps to reproduce:

1. Create a simple app that uses the google maps plugin
2. Create a function where you try to get the visible region with a promise and call that function

[ihadeed]

This should be fixed by #1815