upgrade all packages for full support of null-safety

Hi @tsvillain ,

Hope you are all well ! and happy new year !

I was playing with your great project and one thing that was obvious to me is that you should maybe upgrade all packages for full null-safety support

What do you think about that ?

Cheers,
Luc

[tsvillain]

@lucmichalski I am glade you like my project.
Yes i am planning to upgrade this project to latest dependencies and null safety but due to time constrains not able to work on this, I have created a #6 to track the progress but didn't worked on that. Thanks for reminding me again will definitely try to work on this in upcoming week.