maps_toolkit 3.0.0

Maps toolkit - geo-measurements utils - area of polygon, distance between point, heading and offset between points (port of SphericalUtil, PolyUtil from `android-maps-utils`).

3.0.0

• Update Dart DSK version to 3.0.0+
• Fix PolygonUtil.decode on JavaScript (https://github.com/Dammyololade/flutter_polyline_points/issues/40#issuecomment-751765055)

2.0.1

• Update Dart DSK version up to 2.17.0
• Add LatLng.toString, Location.toString

2.0.0

• BREAKING CHANGE: This version requires Dart SDK 2.12.0 or later (null safety).

1.1.0+2

• fix PolygonUtils.simplify

1.1.0+1

• fix PolygonUtils import

1.1.0

• add PolygonUtils (port from android-maps-utils)

1.0.1+3

• fix issues with deps (move pedantic into dev_dependencies)

1.0.1+2

• fix lint issues

1.0.1+1

• Fix typos

1.0.1

• Documentation update

1.0.0

• Initial version
• Add SphericalUtil (port from android-maps-utils)