Add specific options for apple maps and google maps

[freekvandeven]

In a project I am using platform maps to show apple maps or google maps depending on the platform.
There are some features specific for each of the maps that I need so I added them to the base widget but they are only implemented by either Apple or Google maps.
Also I think it is better to support web through the google variant of the map.

Pre-launch Checklist

• I updated pubspec.yaml with an appropriate new version according to the [pub versioning philosophy].
• I updated CHANGELOG.md to add a description of the change.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making if a test is possible.
• All existing and new tests are passing.