Bump php-di/php-di from 7.0.7 to 7.1.0

Bumps [php-di/php-di](https://github.com/PHP-DI/PHP-DI) from 7.0.7 to 7.1.0.
- [Release notes](https://github.com/PHP-DI/PHP-DI/releases)
- [Commits](PHP-DI/PHP-DI@7.0.7...7.1.0)

---
updated-dependencies:
- dependency-name: php-di/php-di
  dependency-version: 7.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]