Update infection/infection requirement from ^0.20.2 to ^0.23.0 (#77)

* Update infection/infection requirement to ^0.23.0

Updates the requirements on [infection/infection](https://github.com/infection/infection) to permit the latest version.
- [Release notes](https://github.com/infection/infection/releases)
- [Changelog](https://github.com/infection/infection/blob/master/CHANGELOG.md)
- [Commits](infection/infection@0.20.2...0.23.0)

Signed-off-by: dependabot[bot] <[email protected]>

* Update composer.json

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Simon Podlipsky <[email protected]>

Author: dependabot[bot]

composer.json

@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "doctrine/coding-standard": "^8.2",
-        "infection/infection": "^0.20.2",
+        "infection/infection": "^0.23.0",
         "phpstan/extension-installer": "^1.1",
         "phpstan/phpstan": "0.12.90",
         "phpstan/phpstan-phpunit": "0.12.20",