chore(deps-dev): bump @substrate/dev from 0.2.0 to 0.3.0 (#405)

Bumps [@substrate/dev](https://github.com/paritytech/substrate-js-dev) from 0.2.0 to 0.3.0.
- [Release notes](https://github.com/paritytech/substrate-js-dev/releases)
- [Changelog](https://github.com/paritytech/substrate-js-dev/blob/main/CHANGELOG.md)
- [Commits](https://github.com/paritytech/substrate-js-dev/compare/v0.2.0...v0.3.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>