This should has more optional customization

[devmuaz]

Since flutter do the same and offering tuns of different things to do.. every other widget should has the same approach.. I recently worked with this Toast and I couldn't set the property of TextAlign because there is no options to do that.. So what I did is I open the source code and changed them my self and set an options parameters to do that as well.

I hope you guys develop this more efficiently and usefully for other developers. Thank you.