How do i resolve these depreciation errors in flutter?

This package is used in code, but the package was not updated for last 3 years so need to replace package.

if any one Used this package or replace this package pls inform me.

error exactly is :-

Running "flutter pub get" in project...
Resolving dependencies...
The current Dart SDK version is 2.19.0.

Because build_runner >=2.4.0 requires SDK version >=3.0.0-134.0.dev <4.0.0 and no versions of build_runner match >2.3.3 <2.4.0, build_runner >2.3.3 is forbidden.
And because build_runner 2.3.3 depends on crypto ^3.0.0, build_runner >=2.3.3 requires crypto ^3.0.0.
And because every version of powerflutter depends on uuid ^2.0.0 which depends on crypto ^2.0.0, build_runner >=2.3.3 is incompatible with powerflutter.
So, because tacticboard depends on both powerflutter ^0.1.1+1 and build_runner ^2.3.3, version solving failed.
pub get failed
command: "/Users/Develop/flutter/bin/cache/dart-sdk/bin/dart __deprecated_pub --directory . get --example"
pub env: {
  "FLUTTER_ROOT": "/Users/Develop/flutter",
  "PUB_ENVIRONMENT": "flutter_cli:get",
  "PUB_CACHE": "/Users/mac/.pub-cache",
}
exit code: 1

Process finished with exit code 

I download the repo of powerflutter from here and tried to customize the repo.