Bump php-di/php-di from 6.4.0 to 7.0.6

Bumps [php-di/php-di](https://github.com/PHP-DI/PHP-DI) from 6.4.0 to 7.0.6.
- [Release notes](https://github.com/PHP-DI/PHP-DI/releases)
- [Commits](PHP-DI/PHP-DI@6.4.0...7.0.6)

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

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

composer.json

@@ -26,7 +26,7 @@
         "ext-json": "*",
         "chesslablab/php-chess": "^1.3",
         "monolog/monolog": "^2.8",
-        "php-di/php-di": "^6.4",
+        "php-di/php-di": "^7.0",
         "slim/http": "^1.3",
         "slim/php-view": "^3.2",
         "slim/psr7": "^1.5",