Bump lesscpy from 0.14.0 to 0.15.0

Bumps [lesscpy](https://github.com/lesscpy/lesscpy) from 0.14.0 to 0.15.0.
- [Release notes](https://github.com/lesscpy/lesscpy/releases)
- [Commits](lesscpy/lesscpy@0.14.0...0.15.0)

---
updated-dependencies:
- dependency-name: lesscpy
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]