Sdartistics rely on `dart_numerics` for some functions. I migrated the package to be null safe.
https://github.com/zlumyo/dart_numerics/commit/45db0326c2bcffae6212776dd4cd80d398540f7c
https://github.com/zlumyo/dart_numerics/commit/45db0326c2bcffae6212776dd4cd80d398540f7c