Update phpstan/phpstan requirement from 0.12.94 to 0.12.96 (#117)

Updates the requirements on [phpstan/phpstan](https://github.com/phpstan/phpstan) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan/releases)
- [Commits](phpstan/phpstan@0.12.94...0.12.96)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-type: direct:development
...

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

composer.json

@@ -36,7 +36,7 @@
         "nyholm/psr7": "^1.2",
         "php-http/curl-client": "^2.1",
         "phpstan/extension-installer": "^1.1",
-        "phpstan/phpstan": "0.12.94",
+        "phpstan/phpstan": "0.12.96",
         "phpstan/phpstan-phpunit": "0.12.22",
         "phpstan/phpstan-strict-rules": "0.12.10",
         "phpunit/phpunit": "^9.4",