Could you please consider upgrading your dependencies (and perhaps other items)?

[farr64]

Running "flutter pub get" in Weather_Tutorial...
The current Dart SDK version is 2.7.0.

Because weather depends on geolocation >=0.1.1 <1.0.0 which requires SDK version <2.0.0, version solving failed.
pub get failed (1; Because weather depends on geolocation >=0.1.1 <1.0.0 which requires SDK version <2.0.0, version solving failed.)
Process finished with exit code 1

Thanks.