• Improved location matcher for GoTransition.build.

Introduces GoTransitionPage, an extended CustomTransitionPage with:

• PageTransitionsBuilder.buildTransitions as pageTransitionsBuilder.
• PageRoute.canTransitionTo as canTransitionTo.
• PageRoute.canTransitionFrom as canTransitionFrom.
• PageRoute.allowSnapshotting as allowSnapshottting.

Flutter works with Widget Function(PageRoute, BuildContext, Animation<double>, Animation<double>, Widget) signature. This release changes the signature of GoTransition.builder to match this.

• Upgraded RouteTransitionsBuilder to PageRouteTransitionsBuilder for consistency with flutter's PageRouteBuilder.
• Added canTransitionTo and canTransitionFrom to GoTransition.build.
• Added !fullscreenDialog guard as default clause to canTransitionTo, needed for using MaterialPage and CupertinoPage transitions, so it won't perform undesired outgoing transition when the next route is a fullscreen dialog.
• Hide protected api.
• Updated README.md.

• Initial release.