Bug fix release v0.4.2

The release v0.4.1 had an issue where data in staging directory was not cleaned up after it was pushed to backend storage. We recommend updating to this release to avoid this issue.

What's Changed

• Bump aws-sigv4 from 0.54.1 to 0.54.2 by @dependabot in #383
• Fix file deletion by @trueleo in #384
• prepare for bug fix release by @nitisht in #385

Full Changelog: v0.4.1...v0.4.2