I am getting error on 'flutter pub get'

[pavel-birdy]

Running "flutter pub get" in counter_app...
Because every version of flutter_test from sdk depends on test_api 0.2.19-nullsafety.2 which depends on async >=2.5.0-nullsafety <2.5.0, every version of flutter_test from sdk requires async >=2.5.0-nullsafety <2.5.0.

And because every version of swipeable_page_route depends on list_diff ^1.3.0 which depends on async >=2.2.0 <2.5.0, flutter_test from sdk is incompatible with swipeable_page_route.

So, because counter_app depends on both swipeable_page_route ^0.1.4 and flutter_test any from sdk, version solving failed.
pub get failed (1; So, because counter_app depends on both swipeable_page_route ^0.1.4 and flutter_test any from sdk, version solving failed.)
exit code 1

[JonasWanke]

As the error message describes, the list_diff dependency restricts compatible versions of async to >=2.2.0 <2.5.0. There's already an issue (including a workaround) for that: MarcelGarus/list_diff#4

[MarcelGarus]

Fixed this with version 1.3.2 of list_diff.