Bump cssselect from 1.3.0 to 1.4.0

Bumps [cssselect](https://github.com/scrapy/cssselect) from 1.3.0 to 1.4.0.
- [Changelog](https://github.com/scrapy/cssselect/blob/master/CHANGES)
- [Commits](scrapy/cssselect@v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: cssselect
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]