Build(deps): bump phpstan/phpstan-strict-rules in /.dev-tools

Bumps [phpstan/phpstan-strict-rules](https://github.com/phpstan/phpstan-strict-rules) from 1.3.0 to 1.4.3.
- [Release notes](https://github.com/phpstan/phpstan-strict-rules/releases)
- [Commits](phpstan/phpstan-strict-rules@1.3.0...1.4.3)

---
updated-dependencies:
- dependency-name: phpstan/phpstan-strict-rules
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.dev-tools/composer.json

@@ -10,7 +10,7 @@
         "phpstan/extension-installer": "^1.1.0",
         "phpstan/phpstan": "^1.8.2",
         "phpstan/phpstan-phpunit": "^1.1.1",
-        "phpstan/phpstan-strict-rules": "^1.3.0",
+        "phpstan/phpstan-strict-rules": "^1.4.3",
         "squizlabs/php_codesniffer": "^3.7.1",
         "vimeo/psalm": "^4.25.0"
     },