chore(deps): bump decimal.js from 10.5.0 to 10.6.0

Bumps [decimal.js](https://github.com/MikeMcl/decimal.js) from 10.5.0 to 10.6.0.
- [Changelog](https://github.com/MikeMcl/decimal.js/blob/master/CHANGELOG.md)
- [Commits](MikeMcl/decimal.js@v10.5.0...v10.6.0)

---
updated-dependencies:
- dependency-name: decimal.js
  dependency-version: 10.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]