Bump symfony/http-kernel from 4.4.8 to 4.4.13 (#426)

Bumps [symfony/http-kernel](https://github.com/symfony/http-kernel) from 4.4.8 to 4.4.13.
- [Release notes](https://github.com/symfony/http-kernel/releases)
- [Changelog](https://github.com/symfony/http-kernel/blob/master/CHANGELOG.md)
- [Commits](symfony/http-kernel@v4.4.8...v4.4.13)

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