Bump dessant/lock-threads from 2 to 2.0.3 (#255)

Bumps [dessant/lock-threads](https://github.com/dessant/lock-threads) from 2 to 2.0.3.
- [Release notes](https://github.com/dessant/lock-threads/releases)
- [Changelog](https://github.com/dessant/lock-threads/blob/master/CHANGELOG.md)
- [Commits](https://github.com/dessant/lock-threads/compare/v2...v2.0.3

)

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