Flutter : Upgrade package (Problem and Solutions)

So in this tutorial you are going to know how to update old packages with old project ...

So if you have old project with flutter and you are looking to use this project in current time you have to solve problems with packages ... I mean old packages.

steps :
1- open your project with visual studio code .
2- open terminal window in visual studio code .
3- Type next CLI to find outdated packages : flutter pub outdated
4- To start to update packages you have to use next CLI : flutter pub get