build(deps-dev): update shipmonk/phpstan-rules requirement

Updates the requirements on [shipmonk/phpstan-rules](https://github.com/shipmonk-rnd/phpstan-rules) to permit the latest version.
- [Release notes](https://github.com/shipmonk-rnd/phpstan-rules/releases)
- [Commits](shipmonk-rnd/phpstan-rules@1.1.1...1.2.0)

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

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

composer.json

@@ -29,7 +29,7 @@
         "phpstan/phpstan-mockery": "1.1.0",
         "nepada/phpstan-nette-tester": "1.0.0",
         "spaze/phpstan-disallowed-calls": "2.5.0",
-        "shipmonk/phpstan-rules": "1.1.1",
+        "shipmonk/phpstan-rules": "1.2.0",
         "php-parallel-lint/php-parallel-lint": "1.3.2",
         "nepada/coding-standard": "7.5.2",
         "nette/di": "^3.0.6@dev",