Bump php-http/httplug-bundle from 1.13.1 to 1.14.0

Bumps [php-http/httplug-bundle](https://github.com/php-http/HttplugBundle) from 1.13.1 to 1.14.0.
- [Release notes](https://github.com/php-http/HttplugBundle/releases)
- [Changelog](https://github.com/php-http/HttplugBundle/blob/master/CHANGELOG.md)
- [Commits](php-http/HttplugBundle@1.13.1...1.14.0)

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