Vote of confidence for enabling contextless control of the Showcase

[aditya-css]

First of all, thank you for all the love you guys have shown for this package. We are at 180K+ downloads on pub.dev! 🎉

One thing we have felt is that the BuildContext context becomes a hurdle when someone tries to keep all the business logic controlling showcase separate and encapsulated. Another thing is that many people face exception accessing ShowCaseWidget from a context that doesn't include it. Seeing all this, we are thinking of bringing a change by going contextless and we need to hear what you guys would prefer.

We can introduce something like ShowcaseView.get() using which you can invoke all the methods that are available via ShowCaseWidget.of(context). For more details or hands on experience, you can take a look at PR #518 and try it for yourself.

We will go forward in the direction this polls leans towards, whether it be contextless or sticking with the context.

[aditya-css]

The code for context less approach is now merged in the master branch! Thank you for participating.