chore(deps): update bigdecimal requirement from 0.3.0 to 0.4.0 (#6848)

* chore(deps): update bigdecimal requirement from 0.3.0 to 0.4.0

Updates the requirements on [bigdecimal](https://github.com/akubera/bigdecimal-rs) to permit the latest version.
- [Commits](https://github.com/akubera/bigdecimal-rs/commits)

---
updated-dependencies:
- dependency-name: bigdecimal
  dependency-type: direct:production
...

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

* Update tests for decimal rounding

* Update datafusion-cli

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Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Andrew Lamb <[email protected]>

Author: dependabot[bot]