chore: ⬆️ upgrade flutter SDK constraints and dependencies

[moazelsawaf]

Hello! 👋🏻

In this PR, I am updating the Flutter SDK constraints and dependencies to make the package compatible with the latest Flutter versions, resolving the dependency resolution errors ✅

Thanks 🙏🏻

[impatelravi]

Thanks @moazelsawaf

I think this guy is not intrested in updating the package

you can use like this

place_picker:
    git:
      url: https://github.com/moazelsawaf/locationpicker.git
      ref: master