Bump symfony/css-selector from 3.0.0 to 3.3.6
Bump symfony/css-selector from 3.0.0 to 3.3.6

Bumps [symfony/css-selector](https://github.com/symfony/css-selector) from 3.0.0 to 3.3.6.
- [Release notes](https://github.com/symfony/css-selector/releases)
- [Changelog](https://github.com/symfony/css-selector/blob/master/CHANGELOG.md)
- [Commits](https://github.com/symfony/css-selector/commits/v3.3.6)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
xparse/CssExpressionTranslator