Bump cvxpy-base from 1.5.3 to 1.6.0

Bumps [cvxpy-base](https://github.com/cvxpy/cvxpy) from 1.5.3 to 1.6.0.
- [Release notes](https://github.com/cvxpy/cvxpy/releases)
- [Commits](cvxpy/cvxpy@v1.5.3...v1.6.0)

---
updated-dependencies:
- dependency-name: cvxpy-base
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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