Prepare to publish (#364)

Remove prefer-inline for non-trivial Matrix functions (#347)

* Prepare release

prep for publishing 2.1.5 (#344)

refactor the locations of the 'noise.dart' part files (#273)

deprecate the SimplexNoise classes (#271)

Bump SDK constraints for pub (#236)

Use a 2.12.0 lower bound since pub does not understand allowed
experiments for earlier versions.

Use a 3.0.0 upper bound to avoid a warning in pub and to give some
flexibility in publishing for stable.

remove dep overrides (#235)